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

[EX Q]: Sentence: 'a group of people holding kites walking on a beach'. How many words contain the letter 'x' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'looking out a window at a tall building with a clock on the face'. How many words contain the letter 'l' in the sentence.
[EX A]: 4

[EX Q]: Sentence: 'a man holding a flying disc in a game'. How many words contain the letter 'u' in the sentence.
[EX A]:
0