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 bunch of cloths are piled in the sink'. How many words contain the letter 'w' in the sentence.
Example Output: 0

Example Input: Sentence: 'two people eating a hot dog as if its a competition'. How many words contain the letter 'c' in the sentence.
Example Output:
1