TASK DEFINITION: In this task, you need to count the number of words in a sentence that contain the given letter
PROBLEM: Sentence: 'a airplane that has a propeller on the wing'. How many words contain the letter 'z' in the sentence.

SOLUTION: 0

PROBLEM: Sentence: 'ancient pottery being displayed on an exhibit case'. How many words contain the letter 's' in the sentence.

SOLUTION: 2

PROBLEM: Sentence: 'the woman holding an umbrella is walking towards a doorway'. How many words contain the letter 'd' in the sentence.

SOLUTION:
3