Minimalist Sentence Recognizer

This program recognizes sentences of the form:

• Start with a conjunction ("But," "And," "Yet").
• Followed by an imperative clause ("let's + verb phrase").
• The verb phrase includes a verb, an article, an adjective, and a noun (e.g., "try a smaller sentence").

Examples of valid sentences:

• "But, let's try a smaller sentence."
• "And, let's attempt a shorter phrase."
• "Yet, let's consider a simpler statement."