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: 'a picture of a plane in the air'. How many words contain the letter 'l' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'people are competing in a motor bike race'. How many words contain the letter 's' in the sentence.
[EX A]:
0