#include<fstream.h>
#include<math.h>


int main()
{
    int a[100]={1,1,4,7,6,5,6,3,6,9,0,1,6,3,6,2,6,2,4,2,0,6,4,8,6,0,0,2,4,4,2,0,6,0,6,4,0,8,2,6,2,6,6,2,6,4,2,0,8,4,6,0,0,6,2,4,6,6,6,8,4,4,2,2,6,6,8,6,8,6,8,2,4,2,4,6,2,2,4,8,8,2,6,4,0,2,4,6,8,8,4,8,0,2,6,0,2,4,2,4};
    
    char b[500];
    ofstream g("cifra.out");
    ifstream f("cifra.in");
  /*
    double s;
    for(int i=0;i<=99;i++)
      {
       s=pow(i,i);
       g<<fmod(s,10)<<"\n";
       }
    */
    int t;
    f>>t;
    int i=0,len;
    while(i<t)
    {
            f>>b;
            len=strlen(b);
           // g<<b<<"*"<<len<<"**";
         //   g<<b[len-2]<<"/"<<b[len-1]<<"\n";
             // g<<atoi(&b[len]);
              g<<a[atoi(&b[len-2])%100]<<"\n";
           // g<<a[1];
           // g<<(int)b[len-1]+(int)b[len]<<"\n"<<"*";
           // g<<a[((int)b[len-2])*10+(int)b[len-1]]<<"\n";
            i++;  
              } 
             
    f.close();
    g.close();
 return 0;   
}