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 <string>
using namespace std;

int main() {
    string a;
    getline(cin,a);
    for (int i = 0; i < a.length(); ++i) {
        if (a[i]>=65&&a[i]<=90) a[i]+=32;
        else if (a[i]>=97&&a[i]<=122) a[i]-=32;
    }
    cout<<a<<endl;
    return 0;
}
