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<bits/stdc++.h>
using namespace std;

int main(){
    char ch;
    while((ch = getchar()) != EOF){
        if(ch>='a' && ch<='z') ch+='A'-'a';
        else if(ch>='A' && ch<='Z') ch-='A'-'a';
        cout << ch ;
    }
}
