#include <fstream>
#include <string.h>
using namespace std;
ifstream f("cifra.in");
ofstream g("cifra.out");
int solutiibrute[100] =
{
    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 main()
{
    int t,n;
    char stringnr[101];
    f >> t;
    for (int i = 0; i < t; i++)
    {
        f >> stringnr;
        if (strlen(stringnr) > 1 )
            n = (stringnr[strlen(stringnr) - 2] - '0') * 10 + (stringnr[strlen(stringnr) - 1] - '0');
        else
            n = stringnr[strlen(stringnr) - 1] - '0';
        g << solutiibrute[n] << endl;
    }
    f.close();
    g.close();
    return 0;
}