[BOJ] 겨울왕국 티켓 예매

#include <iostream>

using namespace std;

int main()
{
	int T;
	cin >> T;
	for (size_t i = 0; i < T; i++)
	{	
		int n, m;
		cin >> n >> m;
		if (n < 12 || m < 4)
		{
			cout << -1 << endl;
			continue;
		}
		cout << 11 * m + 4 << endl;
	}
}