#include <fstream>
#include <string>
using namespace std;

ifstream fin("cifra.in");
ofstream fout("cifra.out");
int main()
{
    int 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,
                    4,0,3,9,4,0,7,1,0,0  };
    int T;
    string line = "";
    fin >> T;
    for (int i = 0; i < T; i++)
    {
        fin >> line;
        if (line.size() == 1)
        {
            int ultima = line[line.size() - 1] - '0';
            fout << last[ultima] << '\n';
        }
        else if (line.size() > 1 )
        {
            int ultima = line[line.size() - 1] - '0';
            int penultima = line[line.size() - 2] - '0';
            fout << last[penultima * 10 + ultima] << '\n';
        }
    }
    fin.close();
    fout.close();
    return 0;
}