diff --git a/diy4.py b/diy4.py
new file mode 100644
index 0000000..e731d5c
--- /dev/null
+++ b/diy4.py
@@ -0,0 +1,20 @@
+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()
+a = ""
+# 请使用私钥 key，对message进行加
+noise = "#^^^%$#%$%&$%^Y#$%^#*$%^&#$^@#$!#$^@#%%$%&%^$#^&#"
+for i in message:
+    text = i
+    str1=random.choice(key)
+    str2=random.choice(key)
+    text = text+str1+str2
+    a = a + text
+
+a1 = list(a)
+a1.insert(random.randint(0,len(a)),noise)
+b="".join(a1)
+print(b)
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