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 person with blue sneakers and jeans with one foot on a skateboard and the other foot on the ground'. How many words start with the letter 'o' in the sentence.

A: 4
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Q: Sentence: 'a black and white cat is sitting on the bathroom sink'. How many words start with the letter 'i' in the sentence.

A: 1
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Q: Sentence: 'a girl sitting on a blanket in the grass while holding an umbrella'. How many words start with the letter 'a' in the sentence.

A:
3
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