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 little white airplane that is parked on some concrete'. How many words start with the letter 'p' in the sentence.
[A]: 1


[Q]: Sentence: 'horses are being walked around a race track'. How many words start with the letter 't' in the sentence.
[A]: 1


[Q]: Sentence: 'a wisconsin fan at a sporting event wearing a tie with his tshirt'. How many words start with the letter 'a' in the sentence.
[A]:
4