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.

[EX Q]: Sentence: 'a police car driving by a construction truck'. How many words start with the letter 'b' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a statue sitting on top of a bench in the snow'. How many words start with the letter 's' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'a woman walking with two kids and an umbrella'. How many words start with the letter 'a' in the sentence.
[EX A]:
3