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>='a'&&ch<='z') printf("%c",ch-32);
        else if(ch>='A'&&ch<='Z') printf("%c",ch+32);
        else printf("%c",ch);
    }
}
