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 skiing down a mountain slope'. How many words contain the letter 'e' in the sentence.
Example Output: 2

Example Input: Sentence: 'a cat is walking on a wooden deck in the snow'. How many words contain the letter 'q' in the sentence.
Example Output: 0

Example Input: Sentence: 'a sign in a different language to show where they are'. How many words contain the letter 'd' in the sentence.
Example Output:
1