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: 'dental personnel in dentist office standing in front of a computer screen'. How many words contain the letter 'w' in the sentence.
Example Output: 0

Example Input: Sentence: 'penguins gathered on top of rocks by the sea'. How many words contain the letter 'd' in the sentence.
Example Output:
1