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

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: 'an image of a man with a tennis racket in hand'. How many words contain the letter 'u' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'several people and a dog riding on a small boat'. How many words contain the letter 'l' in the sentence.


Output: 3