TASK DEFINITION: In this task, you need to count the number of words in a sentence that contain the given letter
PROBLEM: Sentence: 'a large jetliner with a space shuttle on its back next to a fighter jet'. How many words contain the letter 'm' in the sentence.

SOLUTION: 0

PROBLEM: Sentence: 'a stop sign with some words beneath it'. How many words contain the letter 't' in the sentence.

SOLUTION: 4

PROBLEM: Sentence: 'fighter jets leaving behind patriotic colored vapor trails'. How many words contain the letter 'r' in the sentence.

SOLUTION:
5