TASK DEFINITION: In this task, you need to count the number of words in a sentence that contain the given letter
PROBLEM: Sentence: 'the tennis player returns a serve of the tennis ball'. How many words contain the letter 'q' in the sentence.

SOLUTION: 0

PROBLEM: Sentence: 'a person skiing down part of a marked race course'. How many words contain the letter 'z' in the sentence.

SOLUTION: 0

PROBLEM: Sentence: 'a cat is peeping out from under a blanket'. How many words contain the letter 'n' in the sentence.

SOLUTION:
3