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

Example Input: Sentence: 'a group of people on skis on a snowy slope'. How many words contain the letter 'w' in the sentence.
Example Output: 1

Example Input: Sentence: 'a parked blue and white motorcycle with a black seat'. How many words contain the letter 'd' in the sentence.
Example Output: 2

Example Input: Sentence: 'a father and son ride a skateboard together on asphalt'. How many words contain the letter 'v' in the sentence.
Example Output:
0