#include <iostream>
using namespace std;
int main(int argc, char **argv) {
	char b;
	cin >> b; 
	switch(b) {
		case 'a': 
			cout << "A betű" << endl;
			break;
		case 'b': 
			cout << "B betű" << endl;
			break;
		default:
			cout << "Egyéb" <<endl;
	}
	return 0;
}