👉 Chewink, also known as a chomsky bracket, is an abstract algebraic structure that represents a binary relation between two sets. It consists of two non-empty sets, A and B, with an operation (denoted by ⊕) defined on them. The operation ⊕ takes each element in set A to its corresponding element in set B, and then returns the set of all elements that are related to the input by this relation. The structure of a chewink is as follows