TASK DEFINITION: In this task, you need to count the number of words in a sentence that contain the given letter
PROBLEM: Sentence: 'martha stewart holding a fluffy siamese cat on her arms'. How many words contain the letter 'a' in the sentence.

SOLUTION: 6

PROBLEM: Sentence: 'a carrot and celery are on a cutting board'. How many words contain the letter 's' in the sentence.

SOLUTION: 0

PROBLEM: Sentence: 'a couple of kids sit at a table with some cake'. How many words contain the letter 't' in the sentence.

SOLUTION:
4