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 cat sitting next to boxes of produce sitting in front of a store'. How many words start with the letter 's' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'this grizzly bear is standing in some shallow water'. How many words start with the letter 'g' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a person wearing pants and a jacket pulling luggage'. How many words start with the letter 'p' in the sentence.
[EX A]:
3