begin
  writeb(5 = 5);
  writeb(5 = 4);
  writeb(5 /= 4);
  writeb(5 /= 5);
  writeb(5 < 4);
  writeb(4 < 5);
  writeb(5 >= 4);
  writeb(4 >= 5);
  writeb(5 > 4);
  writeb(4 > 5);
  writeb(5 <= 4);
  writeb(4 <= 5)
end.