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 <cctype>

int main() {
    std::string s{};
    std::getline(std::cin, s);
    for(auto& c : s) {
        if(isalpha(c)) {
            c = islower(c) ? toupper(c) : tolower(c);
        }
    }
    std::cout << s << std::endl;
}

