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 couple of men shaking hands next to a wooden table'. How many words start with the letter 'a' in the sentence.
[A]: 2


[Q]: Sentence: 'a grey cat starring at a hand with a donut'. How many words start with the letter 'a' in the sentence.
[A]: 4


[Q]: Sentence: 'a passenger  plane on the runway being refuled'. How many words start with the letter 'r' in the sentence.
[A]:
2