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

Example Input: Sentence: 'street signs are affixed to a utility pole'. How many words contain the letter 'u' in the sentence.
Example Output: 1

Example Input: Sentence: 'a small plain kitchen with a white stove and microwave'. How many words contain the letter 'h' in the sentence.
Example Output: 3

Example Input: Sentence: 'a van following behind a bus in the street'. How many words contain the letter 't' in the sentence.
Example Output:
2