TASK DEFINITION: In this task, you need to count the number of words in a sentence that contain the given letter
PROBLEM: Sentence: 'a clothing line with teddy bears hung by their ears'. How many words contain the letter 'n' in the sentence.

SOLUTION: 3

PROBLEM: Sentence: 'a hotel room with a nice tv and sofa setup'. How many words contain the letter 'i' in the sentence.

SOLUTION: 2

PROBLEM: Sentence: 'the train is coming out of the tunnel'. How many words contain the letter 'u' in the sentence.

SOLUTION:
2