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 little white airplane that is parked on some concrete'. How many words start with the letter 'p' in the sentence.
[A]: 1


[Q]: Sentence: 'a airplane sitting on a tarmac with work trucks close by'. How many words start with the letter 'a' in the sentence.
[A]: 3


[Q]: Sentence: 'a close up of two zebras in a field'. How many words start with the letter 'i' in the sentence.
[A]:
1