const v:array[0..99] of integer=  
   (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);  
  var  
  f,g:text;  
  t,i,x,j:integer;  
  s,s2:string;  
   begin  
      assign(f,'cifra.in'); reset(f);  
       readln(f,t);  
      assign(g,'cifra.out');  
      rewrite(g);  
        for i:=1 to t do  
        begin  
           readln(f,s);  
           if length(s)=1 then x:=ord(s[1])-48  
                         else x:=(ord(s[length(s)-1])-48)*10+(ord(s[length(s)]  
                         )-48);  
         writeln(g,v[x]);  
       end;  
     close(f);  
      close(g);  
     end.