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

[EX Q]: Sentence: 'a business man is talking on the phone'. How many words contain the letter 'e' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'an elephant near a man sitting down'. How many words contain the letter 'y' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'freshly baked pizza displayed on board with beer'. How many words contain the letter 'r' in the sentence.
[EX A]:
3