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 <string>
using namespace std;

int main() {
	
	string s;
	getline(cin, s);
	
	for (int i = 0; i < s.size(); i++) {
		if ((s[i] >= 'a')&&(s[i] <= 'z')) s[i] -= 32;
		else if ((s[i] >= 'A')&&(s[i] <= 'z')) s[i] += 32;
	}
	cout << s << endl;
	
	return 0;
}
