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 <cstdio>
#include<cctype>
using namespace std;
 
int main(){
    char ch;
    while((ch = getchar()) != EOF){
        if(islower(ch))ch = toupper(ch);
        else ch = tolower(ch);
        cout << ch;
    }
}