In this task, you need to count the number of words in a sentence that contain the given letter

[EX Q]: Sentence: 'a jet airliner carrying a small shuttle above it'. How many words contain the letter 'r' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'a young girl plays tennis in a court with grass in the cracks'. How many words contain the letter 'w' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a group of skiiers going through the snow near a mountain'. How many words contain the letter 'a' in the sentence.
[EX A]:
4