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

Example Input: Sentence: 'a group of many horses going about in a grassy meadow'. How many words contain the letter 'f' in the sentence.
Example Output: 1

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: 'a number of people ride on surf boards in the water'. How many words contain the letter 'k' in the sentence.
Example Output:
0