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 <cstdio>

int main(void)
{
  int c;
  
  while((c = getchar()) != EOF){
    if('a' <= c && c <= 'z'){
      putchar(c - 'a' + 'A');
    } else if('A' <= c && c <= 'Z'){
      putchar(c - 'A' + 'a');
    } else {
      putchar(c);
    }
  }

  return 0;
}
