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.

[EX Q]: Sentence: 'a striped bus travels down a city street at night'. How many words start with the letter 'a' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'a very cute long haired dog laying on a pillow'. How many words start with the letter 'v' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a double parking meter is placed in front of a sick walk'. How many words start with the letter 'w' in the sentence.
[EX A]:
1