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 batter lifts his left foot as he swings the bat'. How many words start with the letter 'a' in the sentence.
[EX A]: 2

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

[EX Q]: Sentence: 'a man in a baseball cap and dog sitting on a pier'. How many words start with the letter 'a' in the sentence.
[EX A]:
4