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 line;
    getline(cin, line);
    for (auto &c: line){
        if (islower(c)){
            putchar(toupper(c));
        }else{
            putchar(tolower(c));
        }
    }
    cout << endl;
}