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

ifstream f("cifra.in");
ofstream g("cifra.out");

int r[102]= {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
               }; /// ultima cifra a fiecarei subsume a sirului intial;

char n[101];

int t;

int main()
{
    int p;

    f>>t;

    for(int i=1; i<=t; i++) /// parcurgerea stringului
    {
        f>>n;


        if(strlen(n)<2) p=n[0]-'0'; ///transformarea in caracter cifra
        else p=(n[strlen(n)-2]-'0')*10+n[strlen(n)-1]-'0'; ///transformarea in caracter cifra

        g<<r[p]<<"\n";/// afisarea elemnrului cautat
    }

    return 0;
}