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

Example Input: Sentence: 'a man with a surfboard walking across a bridge towards the ocean'. How many words contain the letter 'w' in the sentence.
Example Output: 3

Example Input: Sentence: 'several people and a dog riding on a small boat'. How many words contain the letter 'l' in the sentence.
Example Output: 3

Example Input: Sentence: 'the back of the truck is filled with plants and other items'. How many words contain the letter 'k' in the sentence.
Example Output:
2