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

Example Input: Sentence: 'the view from the top of a ski slope'. How many words contain the letter 'r' in the sentence.
Example Output: 1

Example Input: Sentence: 'a group of people skiing down a mountain slope'. How many words contain the letter 'e' in the sentence.
Example Output: 2

Example Input: Sentence: 'a washroom with a toilet and a glass door'. How many words contain the letter 'p' in the sentence.
Example Output:
0