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.size(); i++) {
		if(isupper(str[i]))
			str[i] += 'a'-'A';
		else if(islower(str[i]))
			str[i] += 'A'-'a';
	}

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