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

Example Input: Sentence: 'a kitchen with a dining room table and a sitting area'. How many words contain the letter 'r' in the sentence.
Example Output: 2

Example Input: Sentence: 'a counter top that has many pots and ingredients on it'. How many words contain the letter 'b' in the sentence.
Example Output: 0

Example Input: Sentence: 'two white polar bears rolling around on snow covered ground'. How many words contain the letter 'e' in the sentence.
Example Output:
3