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: 'three people in suits are standing and holding surfboards'. How many words start with the letter 's' in the sentence.
[A]: 3


[Q]: Sentence: 'a display of a variety of pizzas in a restaurant window'. How many words start with the letter 'd' in the sentence.
[A]: 1


[Q]: Sentence: 'a woman is standing and holding a tennis racket'. How many words start with the letter 'a' in the sentence.
[A]:
3