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;

signed main() {
	string s;
	getline(cin, s);

	for (int i = 0; i < s.size(); ++i) {
		if ('a' <= s[i] and s[i] <= 'z') {
			s[i] -= 32;
		}
		else if ('A' <= s[i] and s[i] <= 'Z') {
			s[i] += 32;
		}
	}

	cout << s << endl;
}

