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