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

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: 'he wants everyone to know that he has serious intentions for the tennis game'. How many words contain the letter 'h' in the sentence.

Output: 5


Input: Consider Input: Sentence: 'a fluffy black cat lolls about on a wooden table'. How many words contain the letter 'a' in the sentence.


Output: 6