TASK DEFINITION: In this task, you need to count the number of words in a sentence that contain the given letter
PROBLEM: Sentence: 'a couple sitting on seats on a train'. How many words contain the letter 'z' in the sentence.

SOLUTION: 0

PROBLEM: Sentence: 'a mother and son holding wii controls in front of a christmas fireplace'. How many words contain the letter 'x' in the sentence.

SOLUTION: 0

PROBLEM: Sentence: 'a man is flying a kite while standing on the sand'. How many words contain the letter 's' in the sentence.

SOLUTION:
3