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

Input: Consider Input: Sentence: 'two hotdogs on with various toppings and a drink on a counter'. How many words contain the letter 'w' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'this is a yellow train riding the rails'. How many words contain the letter 'n' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a train traveling down a track near other tracks'. How many words contain the letter 'l' in the sentence.


Output: 1