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

Example Input: Sentence: 'a small child next to a bunch of bananas and an orange'. How many words contain the letter 'p' in the sentence.
Example Output: 0

Example Input: Sentence: 'an untidy room with clothes bottles next to an oven'. How many words contain the letter 'a' in the sentence.
Example Output: 2

Example Input: Sentence: 'the person in the blue shirt has a plaid neck tie on'. How many words contain the letter 'r' in the sentence.
Example Output:
2