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

Example Input: Sentence: 'a mother zebra standing next to a baby zebra'. How many words contain the letter 'e' in the sentence.
Example Output: 4

Example Input: Sentence: 'two animals are walking along in a field'. How many words contain the letter 'y' in the sentence.
Example Output: 0

Example Input: Sentence: 'three children standing behind a little girl with a bat in her hands'. How many words contain the letter 'c' in the sentence.
Example Output:
1