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

[EX Q]: Sentence: 'the tennis player returns a serve of the tennis ball'. How many words contain the letter 'q' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'a man srufing the waves on a board in front of 3 tall pillars'. How many words contain the letter 'n' in the sentence.
[EX A]: 5

[EX Q]: Sentence: 'a crowd of people flying kites near the capitol building'. How many words contain the letter 'a' in the sentence.
[EX A]:
3