TASK DEFINITION: In this task, you need to count the number of words in a sentence that contain the given letter
PROBLEM: Sentence: 'a couple of zebras are standing in a pin'. How many words contain the letter 'a' in the sentence.

SOLUTION: 5

PROBLEM: Sentence: 'a group of many horses going about in a grassy meadow'. How many words contain the letter 'f' in the sentence.

SOLUTION: 1

PROBLEM: Sentence: 'a truck that has a back loaded with motorcycles'. How many words contain the letter 'w' in the sentence.

SOLUTION:
1