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

[EX Q]: Sentence: 'a man flying through the air while riding a snowboard'. How many words contain the letter 'x' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'there is a person awaiting to cross this street'. How many words contain the letter 'a' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'a group of oranges stacked on top each other'. How many words contain the letter 'a' in the sentence.
[EX A]:
4