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);
    for(int i = 0; i < s.length(); i++){
        if(islower(s[i])) s[i] = toupper(s[i]);
        else  if(isupper(s[i])) s[i] = tolower(s[i]);
    }
    cout << s << endl;
}
