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

Example Input: Sentence: 'a black and white photo of a plane sitting on a runway'. How many words contain the letter 'b' 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: 'a person playing with a dog on some grass'. How many words contain the letter 'p' in the sentence.
Example Output:
2