var i,j,x:integer;
begin
     assign(input,'amlei.in');
     reset(input);
     assign(output,'amlei.out');
     rewrite(output);
     i:=0;
     while not eof do
     begin
          readln;
          readln;
          readln;
          i:=i+1;
     end;
     randomize;
     for j:=1 to i do
     begin
          x:=random(2);
          if x=0 then writeln('NU')
                 else writeln('DA');
     end;
close(output);
end.