alex- password

# 判断： > < ==    !=   >= <=
print(1>0)

print('a'<'b')

# 罗马   凯撒大帝
# a  数字
# b  数字
# print(ord('a'))
# print(ord('b'))
# print(ord('z'))
#
#
# print(chr(122))
# print(chr(93))
# 凯撒加密
# a   c  + 2
# b   d  + 2
# c   e  + 2

s = input("请输入需要加密的字符串：")
# 长度  length
for i in s:
    print(chr(ord(i)+2),end="")

print()
s = input("请输入需要解密的字符串：")
for i in s:
    print(chr(ord(i)-2),end="")