#include<fstream>
#include<cstring>
using namespace std;
ifstream fin("cifra.in");
ofstream fout("cifra.out");

int cifra[101]= {0,1,5,2,8,3,9,2,8,7,7,8,
                 2,9,5,0,6,9,5,4,4,5,9,6,2,7,3,6,2,
                 1,1,2,6,3,9,4,0,3,9,8,8,9,3,0,6,1,
                 7,0,6,5,5,6,0,7,3,8,4,7,3,2,2,3,7,
                 4,0,5,1,4,0,9,9,0,4,1,7,2,8,1,7,6,
                 6,7,1,8,4,9,5,8,4,3,3,4,8,5,1,6,2,
                 5,1,0,0
                };

int main()
{
    int T,i,nr,a,b,len;
    char sir[200];
    fin>>T;
    for(i=1; i<=T; i++)
    {
        fin>>sir;
        fin.get();
        len=strlen(sir);
        if(len>=2)
        {
            a=sir[len-2]-'0';
            b=sir[len-1]-'0';
            nr=10*a+b;
        }
        else
            nr=sir[0]-'0';
        fout<<cifra[nr]<<'\n';
    }
}