Let Σ = {a, b}. For each k ≥ 1, let Ck be the language consisting of all strings that contain an a exactly k places from the right-hand end. Thus Ck = Σ∗ aΣ k−1 . Describe an NFA with k + 1 states that recognizes Ck in terms of both a state diagram and a formal description.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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1.60 Let Σ = {a, b}. For each k ≥ 1, let Ck be the language consisting of all strings that contain an a exactly k places from the right-hand end. Thus Ck = Σ∗ aΣ k−1 . Describe an NFA with k + 1 states that recognizes Ck in terms of both a state diagram and a formal description.

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