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

Example Input: Sentence: 'a van follows behind a bus on a rural road'. How many words contain the letter 'q' in the sentence.
Example Output: 0

Example Input: Sentence: 'a small terrier stands in the open suitcase ready to go'. How many words contain the letter 'l' in the sentence.
Example Output: 1

Example Input: Sentence: 'several people laying sitting and walking on the beach near the water near two planes on the tarmac'. How many words contain the letter 'o' in the sentence.
Example Output:
4