It has very few and simple rules, requires no equipment, and it's played in multiple countries around the world, primarily in Europe.
In any case, the reply must be verbal, for example humming an mhm instead of an expected yes isn't considered a valid answer.
This has a one-minute time limit, while the caller and the show host he/she chooses naturally alternates between the questioner and answerer roles, as in a real-life conversation.
In this variant, the caller wins a small assortment of Class FM merchandise if he/she avoids using the forbidden words or he/she manages to make the chosen host say any of them before time runs out.
Both entries cite Katalin Lázár's ethnographical work Népi Játékgyűjtemény ("Folk Game Collection").