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

[EX Q]: Sentence: 'the train needs to be serviced so it is o the truck'. How many words contain the letter 'n' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'a mirror above a bathroom sink next to a window'. How many words contain the letter 'v' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'there is a lot of people in the ocean today'. How many words contain the letter 'y' in the sentence.
[EX A]:
1