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 couple of people are riding horses in a village'. How many words start with the letter 'a' in the sentence.
[A]: 3


[Q]: Sentence: 'a large group of motorcyclists waiting in the street'. How many words start with the letter 'g' in the sentence.
[A]: 1


[Q]: Sentence: 'a skateboarder wearing an oddly shaped helmet crouches while in motion'. How many words start with the letter 'o' in the sentence.
[A]:
1