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 <bits/stdc++.h>
using namespace std;

int	main()
{
	string	str;
	getline(cin, str);
	for (char &x : str) {
		if ('a' <= x && x <= 'z')
			x += 'A' - 'a';
		else if ('A' <= x && x <= 'Z')
			x += 'a' - 'A';
	}
	cout << str << endl;
}

