#639. 【入门】大小写转换
【入门】大小写转换
说明
把一个字符串里所有的大写字母换成小写字母,小写字母换成大写字母。其他字符保持不变。输入格式
输入为一行字符串,其中不含空格。长度不超过80个字符。输出格式
输出转换好的字符串。ABCDefgh123
abcdEFGH123
ABCDefgh123
abcdEFGH123
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