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

Input: Consider Input: Sentence: 'a large pizza smothered in cheese and sauce'. How many words contain the letter 'a' in the sentence.

Output: 5


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: 'close up of a hole puncher sitting on a white paper'. How many words contain the letter 'b' in the sentence.


Output: 0