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


[Q]: Sentence: 'a man and boy blow out a candle on a birthday cake'. How many words start with the letter 'a' in the sentence.
[A]: 4


[Q]: Sentence: 'a large air plane flying in a sky'. How many words start with the letter 'f' in the sentence.
[A]:
1