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

Input: Consider Input: Sentence: 'a white cat sitting on a couch in a den'. How many words contain the letter 'l' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'some elephants in a field of grass near a tree'. How many words contain the letter 'k' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'a hand holding part of a sponge with scissors nearby'. How many words contain the letter 'r' in the sentence.


Output: 3