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>
using namespace std;
int main(){
    string s;
    getline(cin,s);
    for (int i=0;i<s.size();i++){
        if(isupper(s[i]))
            s[i] = tolower(s[i]);
        else if (islower(s[i]))
            s[i] = toupper(s[i]);
    }
    cout<<s<<endl;
}
