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

[EX Q]: Sentence: 'black and white photograph of a man using a cell phone on the street'. How many words contain the letter 'r' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'a group of people skiing down a mountain slope'. How many words contain the letter 'e' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'cat sitting on top of the refrigerator that is covered in notes and magnets'. How many words contain the letter 'd' in the sentence.
[EX A]:
2