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

Example Input: Sentence: 'a blue motorcycle parked next to a tree in a forest'. How many words contain the letter 'm' in the sentence.
Example Output: 1

Example Input: Sentence: 'two hotdogs on with various toppings and a drink on a counter'. How many words contain the letter 'w' in the sentence.
Example Output: 2

Example Input: Sentence: 'a man playing tennis and other people watching'. How many words contain the letter 'w' in the sentence.
Example Output:
1