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


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