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 person doing a trick in the water'. How many words start with the letter 'i' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a couple of people that are playing wii'. How many words start with the letter 'p' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'woman in a dress holding up a white umbrella'. How many words start with the letter 'a' in the sentence.
[EX A]:
2