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 train passes over a quiet city park on a bridge'. How many words start with the letter 'a' in the sentence.

A: 3
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Q: Sentence: 'a skateboarder performing tricks under the lights at night'. How many words start with the letter 'u' in the sentence.

A: 1
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Q: Sentence: 'a group of people stand and talk on a path'. How many words start with the letter 'p' in the sentence.

A:
2
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