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

Input: Consider Input: Sentence: 'a white longheaired dog eating a birthday cake'. How many words contain the letter 'z' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'a little boy learning to throw a frisbee'. How many words contain the letter 'h' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'an adult cat laying in a bathroom sink'. How many words contain the letter 'r' in the sentence.


Output: 1