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 crowd of people on the street one of which is taking pictures with a cell phone'. How many words start with the letter 'o' in the sentence.

A: 4
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Q: Sentence: 'a tall giraffe kissing the bark of a brown tree'. How many words start with the letter 'a' in the sentence.

A: 2
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Q: Sentence: 'a hall with painted walls and poles and a person jumping from skates'. How many words start with the letter 'a' in the sentence.

A:
4
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