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

Example Input: Sentence: 'a black and white photo of a very crowded tropical beach'. How many words contain the letter 'p' in the sentence.
Example Output: 2

Example Input: Sentence: 'a small terrier stands in the open suitcase ready to go'. How many words contain the letter 'l' in the sentence.
Example Output: 1

Example Input: Sentence: 'a large advertisement is displayed on the side of a glass buildling'. How many words contain the letter 'r' in the sentence.
Example Output:
2