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

[EX Q]: Sentence: 'a sidewalk with a toilet laying on side with people in background'. How many words contain the letter 'o' in the sentence.
[EX A]: 4

[EX Q]: Sentence: 'people holding a surfboard and walking down the beach'. How many words contain the letter 'n' in the sentence.
[EX A]: 4

[EX Q]: Sentence: 'a lot of bananas next to a sale sign at a market'. How many words contain the letter 'f' in the sentence.
[EX A]:
1