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 zebra is running toward a shady area under the trees'. How many words start with the letter 'a' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'many sheep gather on a truck and in a field eating hay'. How many words start with the letter 'h' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a young kid is laying down and reading a book'. How many words start with the letter 'a' in the sentence.
[EX A]:
3