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 airplane flying over a dry grass hillside'. How many words contain the letter 'e' in the sentence.

SOLUTION: 4

PROBLEM: Sentence: 'a train on the side of a road on the edge of the water'. How many words contain the letter 'u' in the sentence.

SOLUTION: 0

PROBLEM: Sentence: 'children are flying a kite in a park on a clear day'. How many words contain the letter 'l' in the sentence.

SOLUTION:
3