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(s[i]>='a'&&s[i]<='z')s[i]+='A'-'a';
        else if(s[i]>='A'&&s[i]<='Z')s[i]+='a'-'A';
    }
    cout<<s<<endl;
    return 0;
}
