diff --git a/regexpattern_DAY3.cs b/regexpattern_DAY3.cs
new file mode 100644
index 0000000..b9adb2b
--- /dev/null
+++ b/regexpattern_DAY3.cs
@@ -0,0 +1,3 @@
+string pattern = "mul([0-9]+,[0-9]+)"
+
+Regex rg = new Regex(pattern);
\ No newline at end of file