#include <fstream>
#include <cstring>
using namespace std;
const int sum_last[]={
	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};

int T;
char nr[105];

ifstream fin("cifra.in");
ofstream fout("cifra.out");

int main() {
	fin >> T;
	while (T--) {
		fin >> nr;
		int size = strlen(nr);
        fout << sum_last[(size > 1 ? (nr[size - 2] - '0') * 10 : 0 ) + nr[size - 1] - '0'] << "\n";
    }
    return 0;
}