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: 'a woman with a green umbrella crosses the wet street'. How many words contain the letter 'q' in the sentence.
Example Output: 0

Example Input: Sentence: 'the neon sign has large clock on it'. How many words contain the letter 'a' in the sentence.
Example Output:
2