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

[EX Q]: Sentence: 'a couple of people that are on some skateboards'. How many words contain the letter 'o' in the sentence.
[EX A]: 6

[EX Q]: Sentence: 'a zebra is standing in the shallow water'. How many words contain the letter 't' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'a few birds walking along an alley way'. How many words contain the letter 's' in the sentence.
[EX A]:
1