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


int main()
{
    int a[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 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;
    long x;
    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";
               x=int(b[len-1])-48;
                if(len>1)  x=(int(b[len-2])-48)*10+x;
                                  
                               g<<a[x]<<"\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;   
}