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: 'two men on motorcycles and wearing helmets'. How many words start with the letter 'w' in the sentence.
[A]: 1


[Q]: Sentence: 'a woman walking up to a double decker bus that has stopped'. How many words start with the letter 'w' in the sentence.
[A]: 2


[Q]: Sentence: 'a red motorcycle driving down a race track'. How many words start with the letter 'd' in the sentence.
[A]:
2


