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++){
        if(islower(s[i]))   s[i] = toupper(s[i]);
        else if(isupper(s[i]))  s[i] = tolower(s[i]);
        if(s[i] == '\0')    break;
    }

    cout<<s<<'\n';
}
