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

[EX Q]: Sentence: 'little girl with her bunny beside her sitting on a bench'. How many words contain the letter 'w' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a line of portable toilets stands outdoors under trees'. How many words contain the letter 'l' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'a apple that is sitting on top of a knife'. How many words contain the letter 'u' in the sentence.
[EX A]:
0