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


[Q]: Sentence: 'a bus stops in order to pick up passengers'. How many words start with the letter 'p' in the sentence.
[A]: 2


[Q]: Sentence: 'a guy with a beard holds a white mug with strawberries on it in front of a microwave'. How many words start with the letter 'a' in the sentence.
[A]:
4