Ir. Lies Hartono or known as Cak Lontong is an Indonesian comedian. He is known for his funny and catchy jokes without slandering and demeaning the other party. The jokes are simple and conveyed in a structured standard language, but contain absurd logic that challenges listeners to think. Cak Lontong is also well-known as a syllogist and sometimes likes to insert proverbs of his creations. He brought a new wind to the world of Indonesian comedy.