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

Example 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.
Example Output: 0

Example Input: Sentence: 'people standing in a river surrounding an elephant some are touching it'. How many words contain the letter 'd' in the sentence.
Example Output: 2

Example Input: Sentence: 'three young adults are playing a wii game'. How many words contain the letter 'z' in the sentence.
Example Output:
0