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 covers his ears with his hands as he stands outside a store'. How many words start with the letter 'a' in the sentence.
[A]: 3


[Q]: Sentence: 'a traffic light indicating green for the bicycle lane'. How many words start with the letter 'g' in the sentence.
[A]: 1


[Q]: Sentence: 'green plants growing in a garden on the ground'. How many words start with the letter 'g' in the sentence.
[A]:
4