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>

int main(){
	char c;
	while(scanf("%c",&c)!= EOF){
		if(c >= 'a' && c <= 'z'){
			c = c-32;
		}else if(c >= 'A' && c<='Z'){
			c = c+32;
		}
		printf("%c", c);
	}
}
