var
  f: file of integer;
  i: integer;
begin

  assign(f, 'input.txt');
  rewrite(f);

  if eof(f) then
  begin
    write(f, 20);
    writeln(20);
  end
  else
  begin
    write(f, 40);
    writeln(40);
  end;

  if eof(f) then
  begin
    write(f, 10);
    writeln(10);
  end
  else
  begin
    write(f, 30);
    writeln(30);
  end;

 readln();
end.