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 group gathering in which several people are holding frisbees'. How many words start with the letter 'g' in the sentence.

A: 2
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Q: Sentence: 'a picture of a mirror on a bike'. How many words start with the letter 'o' in the sentence.

A: 2
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Q: Sentence: 'a person in a sled with several skiers on a slope'. How many words start with the letter 'a' in the sentence.

A:
3
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