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

Example Input: Sentence: 'two skiers standing side by side in the snow posing for a picture'. How many words contain the letter 'u' in the sentence.
Example Output: 1

Example Input: Sentence: 'a man holding a frisbee above a crowd of young men'. How many words contain the letter 'i' in the sentence.
Example Output: 2

Example Input: Sentence: 'a stone structure sits in the middle of a grass area'. How many words contain the letter 'y' in the sentence.
Example Output:
0