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 number of motorcycles are on display at a museum'. How many words start with the letter 'o' in the sentence.

A: 2
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Q: Sentence: 'people crowd around the fence to watch skateboarders do tricks'. How many words start with the letter 'p' in the sentence.

A: 1
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Q: Sentence: 'a little boy blowing out the candles on his birthday cake'. How many words start with the letter 'a' in the sentence.

A:
1
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