#include <fstream>
using namespace std;
ifstream fi ("cifra.in");
ofstream fo ("cifra.out");
int n,i,j,x,p,st;
int a[100] = {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} ;
string s;
int main()
{
    fi>>n;
    for (i=1;i<=n;i++)
    {
        fi>>s;
        if (s.size()>1) x=(s[s.size()-2]-48)*10+s[s.size()-1]-48;
        else x=s[s.size()-1]-48;
        fo<<a[x-1]<<'\n';
    }
//    for (i=1;i<=55;i++)
//    {
//      p=1;
//      for (j=1;j<=i;j++) p=(p*i)%10;
//      st+=p;
//      st%=10;
//      fo<<st%10<<',';
//    }
    return 0;
}