#include <cstdlib>
#include <iostream>
#include <fstream>
#include <math.h>

using namespace std;
int t,i,j,a[]={0,1,5,2,8,3,9,2,8,7};
int main()
{
    ifstream f("cifra.in");
    ofstream g("cifra.out");
    f>>t;
    for(i=0;i<t;i++)
    {
        f>>j;
        j = j==0 ? 1:(((j%70)/10)*7+a[j%10])%10;
        g<<j<<"\n";
    }
    return 0;
}