某 Python 程序如下:
def encode(msg,key) :
result=""
for i in range(0,len(msg)) :
c=msg[i]
if "a"<=c<="z":
result=chr((ord(c)+key-ord("a"))%26+ord("a"))+result
elif "0"<=c<="9" :
result=result+chr((ord(c)-key-ord("0"))%10+ord("0"))
return result
msg=input("请输入明文:")
key=int(input("请输入密钥:"))
re=encode(msg,key)
print(re)
程序运行后,输入 msg 的值为“1a2b3c” ,key=2,输出的结果是( )