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

[EX Q]: Sentence: 'a mother zebra standing next to a baby zebra'. How many words contain the letter 'e' in the sentence.
[EX A]: 4

[EX Q]: Sentence: 'a black sign that is standing in the grass'. How many words contain the letter 'f' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'a woman with a dog and they both have matching umbrellas'. How many words contain the letter 'u' in the sentence.
[EX A]:
1