A sequence is a grouping of three or more cards in ascending or descending order, all belonging to the same suit.
Pure sequence: A pure sequence lacks jokers.For example, 5H, 6H, and 7H is a pure sequence. Impure sequence: A sequence that includes jokers is said to be impure.Example- K♣️ Q♣️ J♣️ 7♦️ and K♠️ PJ J♠️ 10♠️ are both examples of an impure sequence,
A collection of three or four cards with the same rank but different suits is known as a rummy set.
Valid sets: Valid sets include groups of three or four cards with the same rank but different suits. Invalid sets: A set of three or four identically ranked cards, not cards of different suits.