#include <fstream>

using namespace std;
ifstream f("cifra.in");
ofstream g("cifra.out");
int u=0,i,j,n,c[100]={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};
char p[110];
int put(int k)                                                                                                                                                                                  {
 int h,ul=1;
 for(h=1;h<=k;h++)
 {
  ul=ul*k;
  ul=ul%10;
 }
 return ul;
}
int main()
{
 f>>n;
 f.get();
 for(i=1;i<=n;i++)
 {
  f.get(p,110);
  f.get();
  int x;
  if (strlen(p)>1)
   x=(p[strlen(p)-2]-'0')*10+p[strlen(p)-1]-'0';
  else
   x=p[strlen(p)-1]-'0';
  g<<c[x]<<"\n";
 }
 return 0;
}