解密以下消息。


密文: gv15$fde$%f#q
加密算法：vigenere密码
密钥：lemon
Plaintext: attackatdawn

Explanation: The Vigenere Cipher was used with the key "lemon" to encrypt the plaintext message "attackatdawn" into the ciphertext "gv15$fde$%f#q".