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>
#include <string>
#include <cctype>
using namespace std;
int main()
{
	string str;
	getline(cin, str);
	
	for (char &c : str) {
		if (isalpha(c)) c = isupper(c) ? tolower(c) : toupper(c);
		cout << c;
	}
	cout << endl;
}