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>
using namespace std;

int main(void){
    char c;
    while(cin.get(c)){
        if(isupper(c)) c = tolower(c);
        else if(islower(c)) c = toupper(c);
        cout << c;
    }
    return 0;
}