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

Example Input: Sentence: 'a person eating a slice of pizza on a table'. How many words contain the letter 'z' in the sentence.
Example Output: 1

Example Input: Sentence: 'an image of a person holding a blunt object is rendered in red and blue tones'. How many words contain the letter 'x' in the sentence.
Example Output: 0

Example Input: Sentence: 'there are many people with luggage outside of the bus'. How many words contain the letter 'k' in the sentence.
Example Output:
0