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 <stdio.h>
#include <cctype>
using namespace std;

int main()
{
	char s;
	
	while(cin.get(s)){
		if(islower(s))
			s = toupper(s);
		else
			s = tolower(s);
		cout.put(s);
	}
	
	return 0;
}
