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>
using namespace std;

int main() {
	string str;
	getline(cin, str);
	for (int i = 0;i < str.length();i++) {
		if (islower(str[i]))
			str[i] = toupper(str[i]);
		else
			str[i] = tolower(str[i]);
	}

	cout << str << endl;
	return 0;
}