import random


#get user input
def get_user_input():
    print("Enter your message:")
    user_input = input(">")
    return user_input


#encrypt message
def encrypt(message):
    encrypted_message = ""
    for char in message:
        encrypted_message += chr(ord(char) + 1)
    return encrypted_message


#decrypt message
def decrypt(message):
    decrypted_message = ""
    for char in message:
        decrypted_message += chr(ord(char) - 1)
    return decrypted_message

#main program
def main():
    user_input = get_user_input()
    encrypted_message = encrypt(user_input)
    print("Encrypted message: " + encrypted_message)
    decrypted_message = decrypt(encrypted_message)
    print("Decrypted message: " + decrypted_message)


#run program
main()