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 man pitching a baseball from a mound to a home plate'. How many words start with the letter 'a' in the sentence.
[A]: 4


[Q]: Sentence: 'a closeup picture of a polar bears head'. How many words start with the letter 'a' in the sentence.
[A]: 2


[Q]: Sentence: 'a young man in a suit looks down and adjusts his tie'. How many words start with the letter 'a' in the sentence.
[A]:
4