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

Input: Consider Input: Sentence: 'a person that is fixing a pillow on a couch'. How many words contain the letter 's' in the sentence.

Output: 2


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 pouring a drink into a blender in the kitchen'. How many words contain the letter 'k' in the sentence.


Output: 2