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 dog is laying down on a small couch'. How many words start with the letter 'a' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'a person walking on a city street with a luggage bag'. How many words start with the letter 'w' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'man holding a box with a large chocolate covered donut'. How many words start with the letter 'l' in the sentence.
[EX A]:
1