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 woman sitting on top of a cement bench near a lake'. How many words contain the letter 'w' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'two men are looking at the image on a cell phone'. How many words contain the letter 'x' in the sentence.
[EX A]:
0