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 on a court with a tennis racket'. How many words start with the letter 'p' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a man and luggage carts outside of an airplane'. How many words start with the letter 'o' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'a row of small sailboats on the water'. How many words start with the letter 'o' in the sentence.
[EX A]:
2