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

Example Input: Sentence: 'a jet airliner carrying a small shuttle above it'. How many words contain the letter 'r' in the sentence.
Example Output: 2

Example Input: Sentence: 'a girl sitting on a bench holding a flower'. How many words contain the letter 'p' in the sentence.
Example Output: 0

Example Input: Sentence: 'a small duckling eating something out of a pond'. How many words contain the letter 'w' in the sentence.
Example Output:
0