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()
{
  char c;
  while(cin.get(c)){
    if(c>='a'&& c<='z'){
      cout << (char)(c-32);
    }else if(c>='A' && c<='Z'){
      cout << (char)(c+32);
    }else cout << c;
  }
  return 0;
}

