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

Input: Consider Input: Sentence: 'a mirror above a bathroom sink next to a window'. How many words contain the letter 'v' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a big sign that is lit up near some buildings'. How many words contain the letter 'r' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a group of vases sitting in front of a store'. How many words contain the letter 'i' in the sentence.


Output: 2