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 c;
	while((c = getchar()) != EOF)
	{
	    if (isalpha(c))
		c ^= 32;
		cout << c;
	}
}

