diff --git a/signal-ex/main.go b/signal-ex/main.go
new file mode 100644
index 0000000..6d11d05
--- /dev/null
+++ b/signal-ex/main.go
@@ -0,0 +1,38 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"strings"
+
+	"github.com/emojisum/emojisum/emoji"
+)
+
+func main() {
+	buf, err := ioutil.ReadFile("num")
+	if err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(2)
+	}
+
+	str := strings.Replace(string(buf), " ", "", -1)
+	i := 0
+	for {
+		if i >= len(str) {
+			break
+		}
+		if strings.Contains(str[i:i+1], "\n") {
+			i += 1
+			fmt.Print("\n")
+			continue
+		}
+		d, err := emoji.FromHexString(str[i : i+2])
+		if err != nil {
+			fmt.Fprintln(os.Stderr, err)
+			os.Exit(2)
+		}
+		i += 2
+		fmt.Print(d)
+	}
+}
diff --git a/signal-ex/num b/signal-ex/num
new file mode 100644
index 0000000..f6c6cf1
--- /dev/null
+++ b/signal-ex/num
@@ -0,0 +1,3 @@
+1589431412 8991911005
+5208747685 9704261801
+9636252115 2237458346
diff --git a/signal-ex/signal_fingerprint_after.png b/signal-ex/signal_fingerprint_after.png
new file mode 100644
index 0000000..331395f
Binary files /dev/null and b/signal-ex/signal_fingerprint_after.png differ
diff --git a/signal-ex/signal_fingerprint_before.png b/signal-ex/signal_fingerprint_before.png
new file mode 100644
index 0000000..71142ba
Binary files /dev/null and b/signal-ex/signal_fingerprint_before.png differ