In this task, you need to count the number of words in a sentence that contain the given letter

Input: Consider Input: Sentence: 'a jet airliner carrying a small shuttle above it'. How many words contain the letter 'r' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a carrot and celery are on a cutting board'. How many words contain the letter 's' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'a surfing simulator with actual water in the city'. How many words contain the letter 'w' in the sentence.


Output: 2