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

Input: Consider Input: Sentence: 'a train on the side of a road on the edge of the water'. How many words contain the letter 'u' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'a computer desk holding a laptop computer and white ceramic lamp'. How many words contain the letter 'r' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a man wearing dark blue shirt and khaki shorts playing frisbee on the beach'. How many words contain the letter 'o' in the sentence.


Output: 2