Acceptors thumb|Fig. 4: Acceptor FSM: parsing the string "nice". thumb|Fig. 5: Representation of an acceptor; this example shows one that determines whether a binary number has an even number of 0s, where S1 is an accepting state and S2 is a non accepting state.
Acceptors thumb|Fig. 4: Acceptor FSM: parsing the string "nice". thumb|Fig. 5 Representation of an acceptor; this exam:ple shows one that determines whether a binary number has an even number of 0s, where S1 is an accepting state and S2 is a non accepting state.