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

Example Input: Sentence: 'a man sits on a bench with a dog in lap reading'. How many words contain the letter 'x' in the sentence.
Example Output: 0

Example Input: Sentence: 'little girl with her bunny beside her sitting on a bench'. How many words contain the letter 'w' in the sentence.
Example Output: 1

Example Input: Sentence: 'a sub sandwich on a plastic tray with a dark colored beverage'. How many words contain the letter 'u' in the sentence.
Example Output:
1