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 <cstdio>

int main(int argc, char const* argv[])
{
	int c;
	while((c = getchar()) != EOF){
			if(c >= 'A' && c <= 'Z')printf("%c", c + 32);
			else if(c >= 'a' && c <= 'z')printf("%c", c - 32);
			else printf("%c", c);
	}
	return 0;
}

