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 person skiing down part of a marked race course'. How many words contain the letter 'z' in the sentence.
Example Output: 0

Example Input: Sentence: 'a man wearing glasses while eating pizza at a table'. How many words contain the letter 'o' in the sentence.
Example Output:
0