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 c;
while(scanf("%c",&c)!=EOF){
if(c-'a'>=0&&c-'a'<26)c-=32;
else if(c-'A'>=0&&c-'A'<26)c+=32;
printf("%c",c);
}
}