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

Example Input: Sentence: 'a large pizza smothered in cheese and sauce'. How many words contain the letter 'a' in the sentence.
Example Output: 5

Example Input: Sentence: 'a person standing in line for food at a food truck'. How many words contain the letter 'c' in the sentence.
Example Output: 1

Example Input: Sentence: 'baby elephant underneath bigger elephants appears to try and stand'. How many words contain the letter 'z' in the sentence.
Example Output:
0