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