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((ch = getchar()) != EOF){
        if((ch>=97)&&(ch<=122))
        printf("%c", ch-32);
        else if((ch>=65)&&(ch<=90))
        printf("%c", ch+32);
        else printf("%c", ch);
    }

    return 0;
}
