#include <iostream>
#include <fstream>
//#include <sstream>
using namespace std;
int main()
{
int n;
short rez[10][10] = 
                  {{0,1,5,2,8,3,9,2,8,7},
                   {7,8,4,7,3,8,4,1,5,4},
                   {4,5,9,2,8,3,9,2,8,7},
                   {1,2,8,5,1,6,2,9,3,2},
                   {8,9,3,6,2,7,3,6,2,1},
                   {5,6,2,5,1,6,2,9,3,2},
                   {2,3,2,4,0,5,1,4,0,9},
                   {9,0,6,9,5,0,6,3,7,6},
                   {6,7,1,4,0,5,1,4,0,9},
                   {3,4,0,7,3,8,4,1,5,4}};
//stringstream sirc (stringstream::in | stringstream::out);
string sir;
ifstream f1 ("cifra.in");
ofstream f2 ("cifra.out");
if (f1.is_open())
{
  while (! f1.eof())
  {
    f1>>n;
    for (int i=0; i<n; ++i)
    {
      short uc,pc,nc;
      char sirc[2]; 
      f1>>sir;
      if (sir.size() >=2)
      {
        sirc[0] = sir.at(sir.size()-2); 
        sirc[1] = sir.at(sir.size()-1); 
        nc = atoi(sirc);
        uc=nc%10;
        nc=nc/10;
        pc=nc%10;
      }
      else
      {
        sirc[0] = sir.at(sir.size()-1); 
        sirc[1] = 0; 
        nc = atoi(sirc);
        uc=nc%10;
        pc=0;
      }
      sir.clear();
      f2<<rez[pc][uc]<<"\n";
    }             
  }
}
f1.close();
f2.close();
return 0;
}