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: 'a man and woman posing in front of a truck'. How many words contain the letter 'c' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'two horses gaze at their handler while on a mountain'. How many words contain the letter 'b' in the sentence.


Output: 0