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

[EX Q]: Sentence: 'a teddy bear laying on a pillow on a bed'. How many words contain the letter 'w' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a man that is sitting on a horse in the grass'. How many words contain the letter 'y' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'a doubledecker bus is traveling down a street'. How many words contain the letter 'u' in the sentence.
[EX A]:
2