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

Input: Consider Input: Sentence: 'a boy is doing a trick with his skateboard'. How many words contain the letter 'y' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a man and woman posing in front of a truck'. How many words contain the letter 'c' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a dog sleeping on the floor in the corner a man looking down at him'. How many words contain the letter 'b' in the sentence.


Output: 0