diff --git a/diy4.py b/diy4.py
new file mode 100644
index 0000000..6331d0f
--- /dev/null
+++ b/diy4.py
@@ -0,0 +1,19 @@
+import random
+
+# 私钥
+key = "hiu85342抽空加全合成！&*&@kdsjvps*！）（&@（&！7859821537马蜂窝，免费活动时风"
+# 要加密语句
+message = "诺依，周末一起去看动漫展吧！"
+
+# 请使用私钥key，对message进行加密
+for i in message:
+    str=i
+    str1=random.choice(key)
+    str2=random.choice(key)
+    message=(str+str1+str2)+message
+len0=random.randint(0,len(message))
+list_message=list(message)
+ss="Usudao在据了解"
+list_message.insert(len0,ss)
+str9="".join(list_message)
+print(str9)
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