#include <fstream>
#include <cstring>

using namespace std;

int power(int &a)
{
    int r=1;
    for(int i=1; i<=a; i++) {r=r*a; r=r%10;}

    return r;
}

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

    int v[101]={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;
    string n;

    f >> t;
    int a;
    for(int i=1; i<=t; i++)
    {
        f >> n;

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

        g << v[a] << endl;
    }
}