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 s;
	getline(cin, s);
	for (auto &c: s) {
		if (c >= 'a' && c <= 'z') {
			c -= 'a';
			c += 'A';
		} else if (c >= 'A' && c <= 'Z') {
			c -= 'A';
			c += 'a';
		}
	}
	cout << s << endl;
}
