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>
#include <cctype>
using namespace std;

int main() {
	string s;
	getline(cin, s);
	for (auto c : s) {
		if (islower(c))
			cout << (char)toupper(c);
		else if (isupper(c))
			cout << (char)tolower(c);
		else
			cout << c;
	}
	cout << endl;
}
