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

Example Input: Sentence: 'a line of portable toilets stands outdoors under trees'. How many words contain the letter 'l' in the sentence.
Example Output: 3

Example Input: Sentence: 'a stop light that is out on a pole'. How many words contain the letter 'z' in the sentence.
Example Output: 0

Example Input: Sentence: 'a bunch of bananas and a orange siting in a pile'. How many words contain the letter 'o' in the sentence.
Example Output:
2