TASK DEFINITION: In this task, you need to count the number of words in a sentence that contain the given letter
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: 'fresh daisies in a rectangular green glass vase'. How many words contain the letter 's' in the sentence.

SOLUTION: 4

PROBLEM: Sentence: 'a vase full of flowers is sitting on a deck'. How many words contain the letter 'i' in the sentence.

SOLUTION:
2