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

Input: Consider Input: Sentence: 'a zebra standing still in the grass near a tree'. How many words contain the letter 'w' in the sentence.

Output: 0


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: 'an old gold and black clock on a stone tower'. How many words contain the letter 'u' in the sentence.


Output: 0