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

[EX Q]: Sentence: 'a woman is posing next to a stop sign'. How many words contain the letter 'u' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'a young man dressed as a nun skateboards down the street'. How many words contain the letter 'e' in the sentence.
[EX A]: 4

[EX Q]: Sentence: 'a crumby chocolate dessert on a plate with a large knife'. How many words contain the letter 'r' in the sentence.
[EX A]:
3