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

