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

Input: Consider Input: Sentence: 'a construction worker smashes away at the roof of a building'. How many words contain the letter 'b' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a white pickup truck thats parked on the corner of an intersection'. How many words contain the letter 'v' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'a parking meter on top of a bridge next to a pole'. How many words contain the letter 'n' in the sentence.


Output: 3