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

Input: Consider Input: Sentence: 'black and white photograph of a man using a cell phone on the street'. How many words contain the letter 'r' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'two men and two men having drinks at a bar'. How many words contain the letter 'g' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a woman riding a motorcycle down a busy city street'. How many words contain the letter 'w' in the sentence.


Output: 2