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()) != EOF) {
		if (96 < ch && ch < 123) {
			printf("%c", ch-32);
		}
		else if (64 < ch && ch < 92) {
			printf("%c", ch+32);
		}
		else {
			printf("%c", ch);
		}
	}

	return 0;
}
