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

Example Input: Sentence: 'a wooden bench sits leveled straight on a slanted ground'. How many words contain the letter 'l' in the sentence.
Example Output: 2

Example Input: Sentence: 'a pile of stuffed brown teddy bears wearing clothing'. How many words contain the letter 'w' in the sentence.
Example Output: 2

Example Input: Sentence: 'a bath tub with a wooden wall next to a white sink'. How many words contain the letter 'b' in the sentence.
Example Output:
2