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 ch;
  while(scanf("%c", &ch) != EOF){
    if(ch >= 65 && ch <= 90) printf("%c", ch + 97 - 65);
    else if(ch >= 97 && ch <= 122) printf("%c", ch - 97 + 65);
    else printf("%c", ch);
  }
}

