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 <stdio.h>
int main() {
  char input;
  int itmp;
  while (scanf("%c", &input) != EOF) {
    itmp = (int) input;
    if (itmp >= 65 && itmp <= 90) itmp += 32;
    else if (itmp >= 97 && itmp <=122) itmp -= 32;
    printf("%c", (char) itmp);
  }
  return 0;
}

