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

Example Input: Sentence: 'adult men playing with flying disc at popular beach'. How many words contain the letter 'o' in the sentence.
Example Output: 1

Example Input: Sentence: 'man holding remote control for video game system'. How many words contain the letter 'u' in the sentence.
Example Output: 0

Example Input: Sentence: 'a boy peeling a carrot with a tool over a sink'. How many words contain the letter 'r' in the sentence.
Example Output:
2