TASK DEFINITION: In this task, you need to count the number of words in a sentence that contain the given letter
PROBLEM: Sentence: 'a green blue and yellow boat sitting in a harbor'. How many words contain the letter 'o' in the sentence.

SOLUTION: 3

PROBLEM: Sentence: 'a red car parked with a gas pump inserted into it'. How many words contain the letter 'l' in the sentence.

SOLUTION: 0

PROBLEM: Sentence: 'plates of oranges apples a doughnut and pastry'. How many words contain the letter 'r' in the sentence.

SOLUTION:
2