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

Input: Consider Input: Sentence: 'a woman is posing next to a stop sign'. How many words contain the letter 'u' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'a giraffe that is eating some leaves from a tree'. How many words contain the letter 'g' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a tennis player jumping up and swinging at a tennis ball with a racket'. How many words contain the letter 's' in the sentence.


Output: 3