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

Input: Consider Input: Sentence: 'a girl at a lake is looking at sand inside of a frisbee'. How many words contain the letter 'u' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'a hotdog is in a bun covered in cheese'. How many words contain the letter 'q' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'there are three laptops on in front of the television'. How many words contain the letter 's' in the sentence.


Output: 2