diff --git a/src/main.rs b/src/main.rs
index daf3eef..b86a84b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,13 +1,22 @@
-fn main() {
-    let mut a: i32 = 10;
-    let mut b: &mut i32 = &mut a;
+#[derive(Debug)]
+struct Point(i32, i32);
 
-    {
-        let c: &mut i32 = &mut b;
-        *c = 20;
-        println!("c: {c}");
+fn left_most<'a>(p1: &'a Point, p2: &'a Point) -> &'a Point {
+    if p1.0 < p2.0 {
+        p1
+    } else {
+        p2
     }
-
-    println!("a: {a}");
-    //println!("b: {b}");
+}
+
+fn main() {
+    let p1: Point = Point(10, 10);
+    let p2: Point = Point(20, 20);
+    {
+        let p3: &Point = left_most(&p1, &p2);
+
+        println!("left_most: {:?}", p3);
+        println!("p3: {:p}", &p3);
+    }
+    println!("p1: {:p}", &p1);
 }
diff --git a/target/.rustc_info.json b/target/.rustc_info.json
index 0c38ebd..889c439 100644
--- a/target/.rustc_info.json
+++ b/target/.rustc_info.json
@@ -1 +1 @@
-{"rustc_fingerprint":16320356917333427825,"outputs":{"4614504638168534921":{"success":true,"status":"","code":0,"stdout":"rustc 1.66.1 (90743e729 2023-01-10)\nbinary: rustc\ncommit-hash: 90743e7298aca107ddaa0c202a4d3604e29bfeb6\ncommit-date: 2023-01-10\nhost: x86_64-unknown-linux-gnu\nrelease: 1.66.1\nLLVM version: 15.0.2\n","stderr":""},"15697416045686424142":{"success":true,"status":"","code":0,"stdout":"___\nlib___.rlib\nlib___.so\nlib___.so\nlib___.a\nlib___.so\n","stderr":""},"10376369925670944939":{"success":true,"status":"","code":0,"stdout":"___\nlib___.rlib\nlib___.so\nlib___.so\nlib___.a\nlib___.so\n/home/vbatts/.rustup/toolchains/stable-x86_64-unknown-linux-gnu\ndebug_assertions\npanic=\"unwind\"\nproc_macro\ntarget_arch=\"x86_64\"\ntarget_endian=\"little\"\ntarget_env=\"gnu\"\ntarget_family=\"unix\"\ntarget_feature=\"fxsr\"\ntarget_feature=\"sse\"\ntarget_feature=\"sse2\"\ntarget_has_atomic=\"16\"\ntarget_has_atomic=\"32\"\ntarget_has_atomic=\"64\"\ntarget_has_atomic=\"8\"\ntarget_has_atomic=\"ptr\"\ntarget_os=\"linux\"\ntarget_pointer_width=\"64\"\ntarget_vendor=\"unknown\"\nunix\n","stderr":""}},"successes":{}}
\ No newline at end of file
+{"rustc_fingerprint":16320356917333427825,"outputs":{"10376369925670944939":{"success":true,"status":"","code":0,"stdout":"___\nlib___.rlib\nlib___.so\nlib___.so\nlib___.a\nlib___.so\n/home/vbatts/.rustup/toolchains/stable-x86_64-unknown-linux-gnu\ndebug_assertions\npanic=\"unwind\"\nproc_macro\ntarget_arch=\"x86_64\"\ntarget_endian=\"little\"\ntarget_env=\"gnu\"\ntarget_family=\"unix\"\ntarget_feature=\"fxsr\"\ntarget_feature=\"sse\"\ntarget_feature=\"sse2\"\ntarget_has_atomic=\"16\"\ntarget_has_atomic=\"32\"\ntarget_has_atomic=\"64\"\ntarget_has_atomic=\"8\"\ntarget_has_atomic=\"ptr\"\ntarget_os=\"linux\"\ntarget_pointer_width=\"64\"\ntarget_vendor=\"unknown\"\nunix\n","stderr":""},"15697416045686424142":{"success":true,"status":"","code":0,"stdout":"___\nlib___.rlib\nlib___.so\nlib___.so\nlib___.a\nlib___.so\n","stderr":""},"4614504638168534921":{"success":true,"status":"","code":0,"stdout":"rustc 1.66.1 (90743e729 2023-01-10)\nbinary: rustc\ncommit-hash: 90743e7298aca107ddaa0c202a4d3604e29bfeb6\ncommit-date: 2023-01-10\nhost: x86_64-unknown-linux-gnu\nrelease: 1.66.1\nLLVM version: 15.0.2\n","stderr":""}},"successes":{}}
\ No newline at end of file
diff --git a/target/debug/.fingerprint/basics00-2aafd7e9003de7a7/bin-basics00.json b/target/debug/.fingerprint/basics00-2aafd7e9003de7a7/bin-basics00.json
deleted file mode 100644
index fbaf1ff..0000000
--- a/target/debug/.fingerprint/basics00-2aafd7e9003de7a7/bin-basics00.json
+++ /dev/null
@@ -1 +0,0 @@
-{"rustc":7419878829587384386,"features":"[]","target":14602933489408981941,"profile":7309141686862299243,"path":1684066648322511884,"deps":[],"local":[{"CheckDepInfo":{"dep_info":"debug/.fingerprint/basics00-2aafd7e9003de7a7/dep-bin-basics00"}}],"rustflags":[],"metadata":7797948686568424061,"config":2202906307356721367,"compile_kind":0}
\ No newline at end of file
diff --git a/target/debug/.fingerprint/basics00-2aafd7e9003de7a7/dep-bin-basics00 b/target/debug/.fingerprint/basics00-2aafd7e9003de7a7/dep-bin-basics00
deleted file mode 100644
index 5fdf103..0000000
Binary files a/target/debug/.fingerprint/basics00-2aafd7e9003de7a7/dep-bin-basics00 and /dev/null differ
diff --git a/target/debug/.fingerprint/basics00-2aafd7e9003de7a7/invoked.timestamp b/target/debug/.fingerprint/basics00-2aafd7e9003de7a7/invoked.timestamp
deleted file mode 100644
index e00328d..0000000
--- a/target/debug/.fingerprint/basics00-2aafd7e9003de7a7/invoked.timestamp
+++ /dev/null
@@ -1 +0,0 @@
-This file has an mtime of when this was started.
\ No newline at end of file
diff --git a/target/debug/.fingerprint/basics00-2aafd7e9003de7a7/output-bin-basics00 b/target/debug/.fingerprint/basics00-2aafd7e9003de7a7/output-bin-basics00
deleted file mode 100644
index 9f37a96..0000000
--- a/target/debug/.fingerprint/basics00-2aafd7e9003de7a7/output-bin-basics00
+++ /dev/null
@@ -1,3 +0,0 @@
-{"message":"cannot borrow `a` as mutable because it is also borrowed as immutable","code":{"code":"E0502","explanation":"A variable already borrowed as immutable was borrowed as mutable.\n\nErroneous code example:\n\n```compile_fail,E0502\nfn bar(x: &mut i32) {}\nfn foo(a: &mut i32) {\n    let y = &a; // a is borrowed as immutable.\n    bar(a); // error: cannot borrow `*a` as mutable because `a` is also borrowed\n            //        as immutable\n    println!(\"{}\", y);\n}\n```\n\nTo fix this error, ensure that you don't have any other references to the\nvariable before trying to access it mutably:\n\n```\nfn bar(x: &mut i32) {}\nfn foo(a: &mut i32) {\n    bar(a);\n    let y = &a; // ok!\n    println!(\"{}\", y);\n}\n```\n\nFor more information on Rust's ownership system, take a look at the\n[References & Borrowing][references-and-borrowing] section of the Book.\n\n[references-and-borrowing]: https://doc.rust-lang.org/book/ch04-02-references-and-borrowing.html\n"},"level":"error","spans":[{"file_name":"src/main.rs","byte_start":93,"byte_end":99,"line_start":7,"line_end":7,"column_start":27,"column_end":33,"is_primary":true,"text":[{"text":"        let c: &mut i32 = &mut a;","highlight_start":27,"highlight_end":33}],"label":"mutable borrow occurs here","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"src/main.rs","byte_start":56,"byte_end":58,"line_start":4,"line_end":4,"column_start":19,"column_end":21,"is_primary":false,"text":[{"text":"    let b: &i32 = &a;","highlight_start":19,"highlight_end":21}],"label":"immutable borrow occurs here","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"src/main.rs","byte_start":169,"byte_end":170,"line_start":12,"line_end":12,"column_start":19,"column_end":20,"is_primary":false,"text":[{"text":"    println!(\"b: {b}\");","highlight_start":19,"highlight_end":20}],"label":"immutable borrow later used here","suggested_replacement":null,"suggestion_applicability":null,"expansion":{"span":{"file_name":"/home/vbatts/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/macros.rs","byte_start":4158,"byte_end":4191,"line_start":136,"line_end":136,"column_start":28,"column_end":61,"is_primary":false,"text":[{"text":"        $crate::io::_print($crate::format_args_nl!($($arg)*));","highlight_start":28,"highlight_end":61}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":{"span":{"file_name":"src/main.rs","byte_start":155,"byte_end":173,"line_start":12,"line_end":12,"column_start":5,"column_end":23,"is_primary":false,"text":[{"text":"    println!(\"b: {b}\");","highlight_start":5,"highlight_end":23}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null},"macro_decl_name":"println!","def_site_span":{"file_name":"/home/vbatts/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/macros.rs","byte_start":4036,"byte_end":4056,"line_start":131,"line_end":131,"column_start":1,"column_end":21,"is_primary":false,"text":[{"text":"macro_rules! println {","highlight_start":1,"highlight_end":21}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}}},"macro_decl_name":"$crate::format_args_nl!","def_site_span":{"file_name":"/home/vbatts/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/macros/mod.rs","byte_start":31203,"byte_end":31230,"line_start":907,"line_end":907,"column_start":5,"column_end":32,"is_primary":false,"text":[{"text":"    macro_rules! format_args_nl {","highlight_start":5,"highlight_end":32}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}}}],"children":[],"rendered":"\u001b[0m\u001b[1m\u001b[38;5;9merror[E0502]\u001b[0m\u001b[0m\u001b[1m: cannot borrow `a` as mutable because it is also borrowed as immutable\u001b[0m\n\u001b[0m  \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12m--> \u001b[0m\u001b[0msrc/main.rs:7:27\u001b[0m\n\u001b[0m   \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12m|\u001b[0m\n\u001b[0m\u001b[1m\u001b[38;5;12m4\u001b[0m\u001b[0m  \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12m|\u001b[0m\u001b[0m \u001b[0m\u001b[0m    let b: &i32 = &a;\u001b[0m\n\u001b[0m   \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12m| \u001b[0m\u001b[0m                  \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12m--\u001b[0m\u001b[0m \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12mimmutable borrow occurs here\u001b[0m\n\u001b[0m\u001b[1m\u001b[38;5;12m...\u001b[0m\n\u001b[0m\u001b[1m\u001b[38;5;12m7\u001b[0m\u001b[0m  \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12m|\u001b[0m\u001b[0m \u001b[0m\u001b[0m        let c: &mut i32 = &mut a;\u001b[0m\n\u001b[0m   \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12m| \u001b[0m\u001b[0m                          \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;9m^^^^^^\u001b[0m\u001b[0m \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;9mmutable borrow occurs here\u001b[0m\n\u001b[0m\u001b[1m\u001b[38;5;12m...\u001b[0m\n\u001b[0m\u001b[1m\u001b[38;5;12m12\u001b[0m\u001b[0m \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12m|\u001b[0m\u001b[0m \u001b[0m\u001b[0m    println!(\"b: {b}\");\u001b[0m\n\u001b[0m   \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12m| \u001b[0m\u001b[0m                  \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12m-\u001b[0m\u001b[0m \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12mimmutable borrow later used here\u001b[0m\n\n"}
-{"message":"aborting due to previous error","code":null,"level":"error","spans":[],"children":[],"rendered":"\u001b[0m\u001b[1m\u001b[38;5;9merror\u001b[0m\u001b[0m\u001b[1m: aborting due to previous error\u001b[0m\n\n"}
-{"message":"For more information about this error, try `rustc --explain E0502`.","code":null,"level":"failure-note","spans":[],"children":[],"rendered":"\u001b[0m\u001b[1mFor more information about this error, try `rustc --explain E0502`.\u001b[0m\n"}
diff --git a/target/debug/.fingerprint/basics00-3922c6fa78ff0509/dep-test-bin-basics00 b/target/debug/.fingerprint/basics00-3922c6fa78ff0509/dep-test-bin-basics00
deleted file mode 100644
index 5fdf103..0000000
Binary files a/target/debug/.fingerprint/basics00-3922c6fa78ff0509/dep-test-bin-basics00 and /dev/null differ
diff --git a/target/debug/.fingerprint/basics00-3922c6fa78ff0509/invoked.timestamp b/target/debug/.fingerprint/basics00-3922c6fa78ff0509/invoked.timestamp
deleted file mode 100644
index e00328d..0000000
--- a/target/debug/.fingerprint/basics00-3922c6fa78ff0509/invoked.timestamp
+++ /dev/null
@@ -1 +0,0 @@
-This file has an mtime of when this was started.
\ No newline at end of file
diff --git a/target/debug/.fingerprint/basics00-3922c6fa78ff0509/output-test-bin-basics00 b/target/debug/.fingerprint/basics00-3922c6fa78ff0509/output-test-bin-basics00
deleted file mode 100644
index 9f37a96..0000000
--- a/target/debug/.fingerprint/basics00-3922c6fa78ff0509/output-test-bin-basics00
+++ /dev/null
@@ -1,3 +0,0 @@
-{"message":"cannot borrow `a` as mutable because it is also borrowed as immutable","code":{"code":"E0502","explanation":"A variable already borrowed as immutable was borrowed as mutable.\n\nErroneous code example:\n\n```compile_fail,E0502\nfn bar(x: &mut i32) {}\nfn foo(a: &mut i32) {\n    let y = &a; // a is borrowed as immutable.\n    bar(a); // error: cannot borrow `*a` as mutable because `a` is also borrowed\n            //        as immutable\n    println!(\"{}\", y);\n}\n```\n\nTo fix this error, ensure that you don't have any other references to the\nvariable before trying to access it mutably:\n\n```\nfn bar(x: &mut i32) {}\nfn foo(a: &mut i32) {\n    bar(a);\n    let y = &a; // ok!\n    println!(\"{}\", y);\n}\n```\n\nFor more information on Rust's ownership system, take a look at the\n[References & Borrowing][references-and-borrowing] section of the Book.\n\n[references-and-borrowing]: https://doc.rust-lang.org/book/ch04-02-references-and-borrowing.html\n"},"level":"error","spans":[{"file_name":"src/main.rs","byte_start":93,"byte_end":99,"line_start":7,"line_end":7,"column_start":27,"column_end":33,"is_primary":true,"text":[{"text":"        let c: &mut i32 = &mut a;","highlight_start":27,"highlight_end":33}],"label":"mutable borrow occurs here","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"src/main.rs","byte_start":56,"byte_end":58,"line_start":4,"line_end":4,"column_start":19,"column_end":21,"is_primary":false,"text":[{"text":"    let b: &i32 = &a;","highlight_start":19,"highlight_end":21}],"label":"immutable borrow occurs here","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"src/main.rs","byte_start":169,"byte_end":170,"line_start":12,"line_end":12,"column_start":19,"column_end":20,"is_primary":false,"text":[{"text":"    println!(\"b: {b}\");","highlight_start":19,"highlight_end":20}],"label":"immutable borrow later used here","suggested_replacement":null,"suggestion_applicability":null,"expansion":{"span":{"file_name":"/home/vbatts/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/macros.rs","byte_start":4158,"byte_end":4191,"line_start":136,"line_end":136,"column_start":28,"column_end":61,"is_primary":false,"text":[{"text":"        $crate::io::_print($crate::format_args_nl!($($arg)*));","highlight_start":28,"highlight_end":61}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":{"span":{"file_name":"src/main.rs","byte_start":155,"byte_end":173,"line_start":12,"line_end":12,"column_start":5,"column_end":23,"is_primary":false,"text":[{"text":"    println!(\"b: {b}\");","highlight_start":5,"highlight_end":23}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null},"macro_decl_name":"println!","def_site_span":{"file_name":"/home/vbatts/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/macros.rs","byte_start":4036,"byte_end":4056,"line_start":131,"line_end":131,"column_start":1,"column_end":21,"is_primary":false,"text":[{"text":"macro_rules! println {","highlight_start":1,"highlight_end":21}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}}},"macro_decl_name":"$crate::format_args_nl!","def_site_span":{"file_name":"/home/vbatts/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/macros/mod.rs","byte_start":31203,"byte_end":31230,"line_start":907,"line_end":907,"column_start":5,"column_end":32,"is_primary":false,"text":[{"text":"    macro_rules! format_args_nl {","highlight_start":5,"highlight_end":32}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}}}],"children":[],"rendered":"\u001b[0m\u001b[1m\u001b[38;5;9merror[E0502]\u001b[0m\u001b[0m\u001b[1m: cannot borrow `a` as mutable because it is also borrowed as immutable\u001b[0m\n\u001b[0m  \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12m--> \u001b[0m\u001b[0msrc/main.rs:7:27\u001b[0m\n\u001b[0m   \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12m|\u001b[0m\n\u001b[0m\u001b[1m\u001b[38;5;12m4\u001b[0m\u001b[0m  \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12m|\u001b[0m\u001b[0m \u001b[0m\u001b[0m    let b: &i32 = &a;\u001b[0m\n\u001b[0m   \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12m| \u001b[0m\u001b[0m                  \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12m--\u001b[0m\u001b[0m \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12mimmutable borrow occurs here\u001b[0m\n\u001b[0m\u001b[1m\u001b[38;5;12m...\u001b[0m\n\u001b[0m\u001b[1m\u001b[38;5;12m7\u001b[0m\u001b[0m  \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12m|\u001b[0m\u001b[0m \u001b[0m\u001b[0m        let c: &mut i32 = &mut a;\u001b[0m\n\u001b[0m   \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12m| \u001b[0m\u001b[0m                          \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;9m^^^^^^\u001b[0m\u001b[0m \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;9mmutable borrow occurs here\u001b[0m\n\u001b[0m\u001b[1m\u001b[38;5;12m...\u001b[0m\n\u001b[0m\u001b[1m\u001b[38;5;12m12\u001b[0m\u001b[0m \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12m|\u001b[0m\u001b[0m \u001b[0m\u001b[0m    println!(\"b: {b}\");\u001b[0m\n\u001b[0m   \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12m| \u001b[0m\u001b[0m                  \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12m-\u001b[0m\u001b[0m \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12mimmutable borrow later used here\u001b[0m\n\n"}
-{"message":"aborting due to previous error","code":null,"level":"error","spans":[],"children":[],"rendered":"\u001b[0m\u001b[1m\u001b[38;5;9merror\u001b[0m\u001b[0m\u001b[1m: aborting due to previous error\u001b[0m\n\n"}
-{"message":"For more information about this error, try `rustc --explain E0502`.","code":null,"level":"failure-note","spans":[],"children":[],"rendered":"\u001b[0m\u001b[1mFor more information about this error, try `rustc --explain E0502`.\u001b[0m\n"}
diff --git a/target/debug/.fingerprint/basics00-3922c6fa78ff0509/test-bin-basics00 b/target/debug/.fingerprint/basics00-3922c6fa78ff0509/test-bin-basics00
deleted file mode 100644
index e69de29..0000000
diff --git a/target/debug/.fingerprint/basics00-3922c6fa78ff0509/test-bin-basics00.json b/target/debug/.fingerprint/basics00-3922c6fa78ff0509/test-bin-basics00.json
deleted file mode 100644
index cf3fc9a..0000000
--- a/target/debug/.fingerprint/basics00-3922c6fa78ff0509/test-bin-basics00.json
+++ /dev/null
@@ -1 +0,0 @@
-{"rustc":7419878829587384386,"features":"[]","target":14602933489408981941,"profile":1021633075455700787,"path":1684066648322511884,"deps":[],"local":[{"CheckDepInfo":{"dep_info":"debug/.fingerprint/basics00-3922c6fa78ff0509/dep-test-bin-basics00"}}],"rustflags":[],"metadata":7797948686568424061,"config":2202906307356721367,"compile_kind":0}
\ No newline at end of file
diff --git a/target/debug/basics00 b/target/debug/basics00
index 3590f99..98eb069 100755
Binary files a/target/debug/basics00 and b/target/debug/basics00 differ
diff --git a/target/debug/deps/basics00-2aafd7e9003de7a7.d b/target/debug/deps/basics00-2aafd7e9003de7a7.d
deleted file mode 100644
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