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: 'some signs and the roof of a train station'. How many words start with the letter 'a' in the sentence.
[A]: 2


[Q]: Sentence: 'a boy in an orange jacket holds a blue and white tennis racket'. How many words start with the letter 'w' in the sentence.
[A]: 1


[Q]: Sentence: 'a small kitchen with a lot of filled up shelves'. How many words start with the letter 'w' in the sentence.
[A]:
1