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 <iostream>

int main(void)
{
	using namespace std;
	char c;
	while(cin.get(c))
	{
		if(c >= 'a' && c <= 'z')
			cout << char(c - 32);
		else if(c >= 'A' && c <= 'Z')
			cout << char(c + 32);
		else
			cout << c;
	}
	return 0;
}
