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>

int main() {
	std::string s;

	std::getline(std::cin, s);

	for (char &c : s) {
		if (std::islower(c)) {
			c = std::toupper(c);
		} else if (std::isupper(c)) {
			c = std::tolower(c);
		}
	}
	
	std::cout << s << '\n';

	return 0;
}
