#include <fstream>
#include <string>

#define NMAX 15000

int v[] = { 0, 1, 5, 2, 8, 3, 9, 2, 8, 7, 7, 8, 4, 7, 3, 8, 4, 1, 5, 4, 4, 5, 9, 6, 2, 7, 3, 6, 2, 1, 1, 2, 8, 1, 7, 2, 8, 5, 9, 8, 8, 9, 3, 0, 6, 1, 7, 0, 6, 5, 5, 6, 2, 5, 1, 6, 2, 9, 3, 2, 2, 3, 7, 4, 0, 5, 1, 4, 0, 9, 9, 0, 6, 9, 5, 0, 6, 3, 7, 6, 6, 7, 1, 8, 4, 9, 5, 8, 4, 3, 3, 4, 0, 3, 9, 4, 0, 7, 1, 0 };
//ultimele cifre

int main()
{
	std::ifstream fin("cifra.in");
	std::ofstream fout("cifra.out");
	
	int t;
	fin >> t;

	std::string n;
	int nr;
	for (int i = 0; i < t; i++) {
		fin >> n;

		if (n.size() > 1)
			nr = (n[n.size() - 1] - '0') + 10 * (n[n.size() - 2] - '0');
			//prima cifra + a doua
		else
			nr = n[0] - '0';

		fout << v[nr] << "\n";
	}

	fin.close(), fout.close();

	return 0;
}