In this task, you need to count the number of words in a sentence that start with the given letter. Answer with numbers and not words.

Q: Sentence: 'a boy wearing blue has a skateboard in the air near a black railing'. How many words start with the letter 'a' in the sentence.

A: 4
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Q: Sentence: 'a cat is laying in a bowl with a receipt'. How many words start with the letter 'a' in the sentence.

A: 3
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Q: Sentence: 'a man wearing his hat backward with a tennis racket and ball in his hand'. How many words start with the letter 'b' in the sentence.

A:
2
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