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

[EX Q]: Sentence: 'a fresh flower on a table in a piture of water'. How many words contain the letter 'n' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'a airplane is seen at the airport with other airplanes'. How many words contain the letter 'z' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'woman posing for picture in mirror with decorative wall'. How many words contain the letter 'u' in the sentence.
[EX A]:
1