TASK DEFINITION: In this task, you need to count the number of words in a sentence that contain the given letter
PROBLEM: Sentence: 'a girl at a lake is looking at sand inside of a frisbee'. How many words contain the letter 'u' in the sentence.

SOLUTION: 0

PROBLEM: Sentence: 'a black sign that is standing in the grass'. How many words contain the letter 'f' in the sentence.

SOLUTION: 0

PROBLEM: Sentence: 'a room showing a very large window and a vase of flowers'. How many words contain the letter 'w' in the sentence.

SOLUTION:
3