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

Input: Consider Input: Sentence: 'a beautiful old clock tower in a citys historic district'. How many words contain the letter 'a' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a persons desk with a computer and many books in a case behind it'. How many words contain the letter 'd' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a bird flying over a body of water'. How many words contain the letter 'h' in the sentence.


Output: 0