Problem:
Toggling Cases

Write a program which converts uppercase/lowercase letters to lowercase/uppercase for a given string.

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.

Constraints

The length of the input string < 1200

Sample Input

fAIR, LATER, OCCASIONALLY CLOUDY.

Sample Output

Fair, later, occasionally cloudy.

Solution in C (judge verdict: Time Limit Exceeded)

#include <stdio.h>
#include <stdlib.h>

int main()
{
	char input;

	while (1)
	{
		scanf("%c", &input);
		if (islower(input))
		{
			printf("%c", toupper(input));
		}
		else if(isupper(input))
		{
			printf("%c", tolower(input));
		}
		else
		{
			printf("%c", input);
		}
	}


	return 0;
}