#include <iostream>
using namespace std;
int main()
{
int n,k;
cout << "Кол-во книг: ";
cin >> n;
cout << "Кол-во шестерёнок: ";
cin >> k;
if (n >= 10 && k >= 20) {
cout << "The book case has been crafted";
}
else {
cout << "Not enough materials";
}
return 0;
}