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 s[1200];
	int c;
	int cnt=0;
	
	
	while((c=getchar())!=EOF){
		if(c>='a'&&c<='z'){
			c=c-32;
		}else if(c>='A'&&c<='Z'){
			c=c+32;
		}
		s[cnt]=c;
		cnt++;
		putchar(c);
	}
	
	return 0;
}