TASK DEFINITION: In this task, you need to count the number of words in a sentence that contain the given letter
PROBLEM: Sentence: 'a stop sign with some words beneath it'. How many words contain the letter 't' in the sentence.

SOLUTION: 4

PROBLEM: Sentence: 'young girls with backpacks are standing near stairs that look to go to the subway'. How many words contain the letter 'r' in the sentence.

SOLUTION: 4

PROBLEM: Sentence: 'a shack next to a rive with a bell on the side of it '. How many words contain the letter 'v' in the sentence.

SOLUTION:
1