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 <bits/stdc++.h>

using namespace std;

int main()
{
	string s;
	getline(cin, s);

	int len = s.length();

	for (int i = 0; i < len; i++){
		if (isupper(s[i]))
			s[i] = tolower(s[i]);
		else if (islower(s[i]))
			s[i] = toupper(s[i]);
	}

	cout << s << endl;

	return 0;
}

