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 ('a' <= s[i] && s[i] <= 'z') s[i] += 'A' - 'a';
		else if ('A' <= s[i] && s[i] <= 'Z') s[i] += 'a' - 'A';
	}
	cout << s << endl;

}
