#include <iostream>

using std::endl;
using std::cin;
using std::cout;

int
main () {
	char x;
	int int_x;
	do{
		std::cout << " Please press now 1, 2, 3, 4, 5 or 6 to continue " << std::endl;
		std::cin >> x;
	} while ((x!='1') && (x!= '2') && (x!= '3') && (x!= '4') && (x!= '5') && (x!= '6'));
	cout << "OK" << endl;
	int_x = x - '0';
	cout << int_x + 10 << endl;	// einai arithmos, mporeis na kaneis pra3i
	return 0;
}