TASK DEFINITION: In this task, you need to count the number of words in a sentence that contain the given letter
PROBLEM: Sentence: 'a man walking in front of a train station'. How many words contain the letter 'o' in the sentence.

SOLUTION: 3

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: 'two donuts made of fabric are sitting on a table'. How many words contain the letter 'n' in the sentence.

SOLUTION:
3