Forming particular card combinations, or "hands," is the fundamental idea behind rummy. In rummy, sets & runs make up a standard hand. A run play slots real moneyis when three or more consecutive cards of the same suit appear in a row, whereas a set is when three or four cards of the same rank but different suits appear together. For example, a run might have the 4, 5, and 6 of hearts, while a set might have three Kings from various suits.