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 ('a' <= c && c <= 'z') c += 'A' - 'a';
	    else if ('A' <= c && c <= 'Z') c += 'a' - 'A';
	    cout << c;
	}
	cout << endl;
}
