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

Example Input: Sentence: 'a woman in a wheelchair is about to play tennis'. How many words contain the letter 'r' in the sentence.
Example Output: 1

Example Input: Sentence: 'three birds perched on top of a wire fence'. How many words contain the letter 'b' in the sentence.
Example Output: 1

Example Input: Sentence: 'a plate of food that is on a table'. How many words contain the letter 'q' in the sentence.
Example Output:
0