const  a:array[0..99] of byte=(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  i,x,j,t,e,nr:integer;
     n,c:string;
     f,g:text;
begin
  assign(f,'cifra.in');
  reset(f);
  assign(g,'cifra.out');
  rewrite(g);
  readln(f,t);
  for i:=1 to t do
  begin
    readln(f,n);
    c:=copy(n,length(n)-1,2);
    val(c,nr,e);
    writeln(g,a[nr]);
  end;
  close(f);
  close(g);
end.