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 holding a tennis racquet on a tennis court'. How many words contain the letter 'w' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'a soldier holds something for a young bear'. How many words contain the letter 'a' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'two men riding snowboards sitting down on the snow'. How many words contain the letter 'i' in the sentence.


Output: 2