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 s;
    getline(cin,s);

    int len=s.size();
    for(int i=0; i<len; i++){
        if(s[i]>=65 && s[i]<=90) s[i]=tolower(s[i]);
        else s[i]=toupper(s[i]);
    }

    cout<<s<<endl;
    return 0;
}

