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

SOLUTION: 4

PROBLEM: Sentence: 'two elephants in the water in front of a waterfall'. How many words contain the letter 'x' in the sentence.

SOLUTION: 0

PROBLEM: Sentence: 'these cows are in a parking lot next to a fence'. How many words contain the letter 'r' in the sentence.

SOLUTION:
2