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

Example Input: Sentence: 'a bench is in the ocean water with a fishing pole'. How many words contain the letter 'm' in the sentence.
Example Output: 0

Example Input: Sentence: 'people holding a surfboard and walking down the beach'. How many words contain the letter 'n' in the sentence.
Example Output: 4

Example Input: Sentence: 'group of people standing and talking in a living room'. How many words contain the letter 'z' in the sentence.
Example Output:
0