题号：NC15971
时间限制：C/C++/Rust/Pascal 1秒，其他语言2秒
空间限制：C/C++/Rust/Pascal 128 M，其他语言256 M
64bit IO Format: %lld
题目描述
Users prefer simple passwords that are easy to remember, but such passwords are often insecure. Some sites use random computer-generated passwords, but users have a hard time remembering them. But today I improved the website system, which greatly reduced the probability of password being cracked. So we can generate a simple password for each ID by default.
Each id has its initial password.
Do the following two jobs at the same time:
1.Turn uppercase letters to lowercase letters
2.Turn lowercase letters to uppercase letters
You can get the initial password for the id.
输入描述:
The input consists of one or more identities(ID), one per line.
The length of each id is between 1 and 100. Each id only consists of letters and digits.
输出描述:
For each id, output the corresponding initial password.