diff --git a/NP/NP12.py b/NP/NP12.py
new file mode 100644
index 0000000..5862069
--- /dev/null
+++ b/NP/NP12.py
@@ -0,0 +1,8 @@
+#!/usr/bin/env python3
+# @author 轩辕龙儿
+# @date 2022/10/25
+# @file NP12.py
+s = input()
+print(s.lower())
+print(s.upper())
+print(s.title())