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

Example Input: Sentence: 'a large zebra standing out in a grassy field'. How many words contain the letter 'e' in the sentence.
Example Output: 3

Example Input: Sentence: 'a cat is walking on a wooden deck in the snow'. How many words contain the letter 'q' in the sentence.
Example Output: 0

Example Input: Sentence: 'an airplane is prepared for take off on the air strip'. How many words contain the letter 'n' in the sentence.
Example Output:
3