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(){
    
    string a;
    getline(cin,a);
    for(int i=0;i<a.length();i++){
        if(isupper(a[i])){ putchar(tolower(a[i]));}
        else{putchar(toupper(a[i]));}
    }
    cout << endl;
    
    return 0;
}
