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.h>
#include <ctype.h>

using namespace std;

int main(){
  string str;

  getline(cin, str);
  for( auto &i : str){
    if(isupper(i) ){
      i = tolower(i);
    }else{
      i = toupper(i);
    }
  }
  cout << str << endl;
}