Write a program which converts uppercase/lowercase letters to lowercase/uppercase for a given string.

Constraints

* The length of the input string < 1200

Input

A string is given in a line.

Output

Print the converted string in a line. Note that you do not need to convert any characters other than alphabetical letters.

Example

Input

fAIR, LATER, OCCASIONALLY CLOUDY.


Output

Fair, later, occasionally cloudy.
#include <stdio.h>

int main() {
	char ch;
	while (~(ch = getchar())) {
		if (97 <= ch && ch <= 122) printf("%c", ch - 32);
		else if (65 <= ch && ch <= 90) printf("%c", ch + 32);
		else printf("%c", ch);
	}
}
