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

Input: Consider Input: Sentence: 'person standing in the grass striking a baseball with a bat'. How many words contain the letter 's' in the sentence.

Output: 5


Input: Consider Input: Sentence: 'a fire hydrant on a neighborhood street with trees and shrubs around it'. How many words contain the letter 'k' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'a man is riding a long skateboard in sparkling shorts'. How many words contain the letter 'u' in the sentence.


Output: 0