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

Example Input: Sentence: 'a young man standing in front of a laptop computer'. How many words contain the letter 'y' 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 blue street sign sitting next to a brick building'. How many words contain the letter 'l' in the sentence.
Example Output:
2