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

Input: Consider Input: Sentence: 'a child on the sand and a boat and some water'. How many words contain the letter 's' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a kitchen filled with appliances and furniture next to windows'. How many words contain the letter 'p' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a black and white cow standing next to a metal fence'. How many words contain the letter 'b' in the sentence.


Output: 1