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

[EX Q]: Sentence: 'a person in the air with a skateboard upside down underneath'. How many words contain the letter 'i' in the sentence.
[EX A]: 4

[EX Q]: Sentence: 'a woman is posing next to a stop sign'. How many words contain the letter 'u' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'a red train is riding next to a lake in the afternoon'. How many words contain the letter 'x' in the sentence.
[EX A]:
1