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<iostream>
#include <cstdio>
#include<cctype>

using namespace std;

int main(){
	
	char ch;
	
	while((ch = getchar()) != EOF){
		if(islower(ch))
			ch = toupper(ch);
		else
			ch = tolower(ch);
		cout << ch;
	}
	
	return 0;
}