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

Input: Consider Input: Sentence: 'a man riding a snowboard down the side of a snow covered slope'. How many words contain the letter 'c' in the sentence.

Output: 1

Input: Consider Input: Sentence: 'child standing in front of a stop sign on a suburban street corner'. How many words contain the letter 'u' in the sentence.

Output: 1

Input: Consider Input: Sentence: 'a woman in blue shorts grass trees and a frisbee'. How many words contain the letter 'l' in the sentence.
Output: 1