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 with a surfboard walking across a bridge towards the ocean'. How many words contain the letter 'w' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a person that is flying a hamburger kite'. How many words contain the letter 'b' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'an empty sign stands next to a road'. How many words contain the letter 'v' in the sentence.


Output: 0