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 couple of kids are sitting in the grass'. How many words start with the letter 'a' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'here is an asian standing by a yellow fire hydrant'. How many words start with the letter 'h' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'a stack of donuts sitting on top of a white plate'. How many words start with the letter 'o' in the sentence.
[EX A]:
3