diff --git a/diy4.py b/diy4.py
new file mode 100644
index 0000000..fb35fa8
--- /dev/null
+++ b/diy4.py
@@ -0,0 +1,23 @@
+import random
+
+# 私钥
+key = "abcdefgh使用编程实现位移替换加密，制作密码机关真是太好玩了哈哈！"
+# 要加密语句
+message=input("请输入要加密的语句：")
+password="port:%$&*"
+pa1=list(password)
+print(pa1)
+# 请使用私钥key，对message进行加密
+i=0
+for i in message:
+    str1=i
+    str2=random.choice(keg)
+    str3=random.choice(key)
+    text=str1+str2+str3
+    print(text)
+    mess=list(message)
+    num=random.randint(0,len(mess))
+    mess.insert(num,password)
+    print("",join(mess))
+
+