diff --git a/src/verify.py b/src/verify.py
new file mode 100644
index 0000000..ef7ad16
--- /dev/null
+++ b/src/verify.py
@@ -0,0 +1,17 @@
+N = [1,2,3,4,5,6,7,8,9]
+
+def f(A:list,k:int)->bool:
+    return k in A
+
+
+def insert_number()->int:
+    print("insert a number")
+    k = int(input())
+    return k
+
+if __name__ == "__main__":
+    z = insert_number()
+    if f(N,z) is True:
+        print("number is in the list")
+    else:
+        print("number is not in the list")