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<cstdio>
#include<cstring>
int main(void){
	char a[1500];
	for (int i = 0; scanf("%c", &a[i])!=EOF; i++){
		if (64< a[i] && a[i] <91 )printf("%c", a[i] + 32);
		else if (96< a[i] && a[i] <123)printf("%c", a[i] - 32);
		else printf("%c", a[i]);
	}

	return 0;
}