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 zebras are standing in a pin'. How many words contain the letter 'a' in the sentence.
[EX A]: 5

[EX Q]: Sentence: 'antique fire truck restored and displayed at outdoor event'. How many words contain the letter 'x' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'a man walks down the strip as it rains'. How many words contain the letter 'n' in the sentence.
[EX A]:
3