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

Example Input: Sentence: 'a ram standing still in an empty pasture'. How many words contain the letter 'x' in the sentence.
Example Output: 0

Example Input: Sentence: 'a teddy bear laying on a pillow on a bed'. How many words contain the letter 'w' in the sentence.
Example Output: 1

Example Input: Sentence: 'a toilet with a roll of paper hanging over it in a bin'. How many words contain the letter 'b' in the sentence.
Example Output:
1