TASK DEFINITION: In this task, you need to count the number of words in a sentence that contain the given letter
PROBLEM: Sentence: 'a person in the air with a skateboard upside down underneath'. How many words contain the letter 'i' in the sentence.

SOLUTION: 4

PROBLEM: Sentence: 'a laptop is displayed on a small wooden platform'. How many words contain the letter 'k' in the sentence.

SOLUTION: 0

PROBLEM: Sentence: 'an airplane parked on the runway outside an airport'. How many words contain the letter 'u' in the sentence.

SOLUTION:
2