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 on a boat pets a dog in a life jacket'. How many words contain the letter 'b' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'people fly kites and relax at a crowded sunlit beach'. How many words contain the letter 'l' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'a man standing next to a  beautiful girl while holding ski poles'. How many words contain the letter 'u' in the sentence.


Output: 1