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>

using namespace std;

string str;
int main(){
    getline(cin, str);
    for(int i = 0; i < str.length(); ++i){
        if(isupper(str[i])) str[i] += 32;
        else if(islower(str[i])) str[i] -= 32;
    }
    cout << str << endl;
}
