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>

using namespace std;

int main()
{
	ios::sync_with_stdio(false);
	cin.tie(0);
	char ch;
	while(cin.get(ch)) {
		if('A'<=ch&&ch<='Z') cout<<(char)(ch-'A'+'a');
		else if('a'<=ch&&ch<='z') cout<<(char)(ch-'a'+'A');
		else cout<<ch;
	}
	return 0;
}

