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

Example Input: Sentence: 'person standing in the grass striking a baseball with a bat'. How many words contain the letter 's' in the sentence.
Example Output: 5

Example Input: Sentence: 'a man in a restaurant makes the v sign with both hands'. How many words contain the letter 'n' in the sentence.
Example Output: 5

Example Input: Sentence: 'a couple of bulls being led down a street by a crowd of people'. How many words contain the letter 'c' in the sentence.
Example Output:
2