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 man wearing a striped tie and a jacket'. How many words start with the letter 'j' in the sentence.
[A]: 1


[Q]: Sentence: 'a couple of people sitting on a couch plays with a wii remote'. How many words start with the letter 'w' in the sentence.
[A]: 2


[Q]: Sentence: 'a couple of people are standing by a tall giraffe'. How many words start with the letter 'a' in the sentence.
[A]:
3