#include <iostream>
#include <fstream>
#include <cstring>

using namespace std;

ifstream fin("cifra.in");
ofstream fout("cifra.out");

int verif[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
                };

char n[101];
int t;

int main()
{
    int p,i;
    fin>>t;
    for( i=1; i<=t; i++)
    {
        fin>>n;
     //   cout<<n<<" ";
        if(strlen(n)<2) p=n[0]-'0';
        else p=(n[strlen(n)-2]-'0')*10+n[strlen(n)-1]-'0';
        fout<<verif[p]<<'\n';
    }
    return 0;
}