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

Example Input: Sentence: 'unusual round vase with flower stems inside it'. How many words contain the letter 'c' in the sentence.
Example Output: 0

Example Input: Sentence: 'a man showing a piece of hardware he took apart'. How many words contain the letter 'y' in the sentence.
Example Output: 0

Example Input: Sentence: 'an empty wooden bench next to a long row of yellow flowers'. How many words contain the letter 'w' in the sentence.
Example Output:
4