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

[EX Q]: Sentence: 'an elephant that is eating some leaves from a tree'. How many words contain the letter 'n' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'a keyboard on a table with a toothbrush a book some sunglasses and coffee'. How many words contain the letter 'e' in the sentence.
[EX A]: 5

[EX Q]: Sentence: 'a cow stands on a step outside an open door as another cow stands behind'. How many words contain the letter 'd' in the sentence.
[EX A]:
5