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

Example Input: Sentence: 'a sandwich shop with cars parked in front of it'. How many words contain the letter 'u' in the sentence.
Example Output: 0

Example Input: Sentence: 'a man in mid swing of a baseball bat'. How many words contain the letter 'k' in the sentence.
Example Output: 0

Example Input: Sentence: 'a boy with a hat is next to a fence at the zoo'. How many words contain the letter 'y' in the sentence.
Example Output:
1