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>
#include<string>
using namespace std;

int main(){
 string s;
 getline(cin,s);
 for(int i=0; i<(int)s.size(); i++){
   if(s[i] >='a' && s[i] <= 'z') s[i] = s[i] -32;
   else if('A' <= s[i] && s[i] <= 'Z') s[i] = s[i] + 32;
   cout << s[i];
 }
 cout << endl;
}
