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

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 young pitcher throws a ball on the pitchers mound while a man in red shirt looks at him'. How many words contain the letter 'z' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'two boys are playing with a frisbee near some houses'. How many words contain the letter 'w' in the sentence.


Output: 2