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

Input: Consider Input: Sentence: 'a bunch of white hyacinths arranged in a vase'. How many words contain the letter 'r' in the sentence.

Output: 1

Input: Consider Input: Sentence: 'sitting room with couch and entertainment system in cabinets'. How many words contain the letter 'e' in the sentence.

Output: 3

Input: Consider Input: Sentence: 'a toilet sits across from a sink in a very spartan bathroom'. How many words contain the letter 'v' in the sentence.
Output: 1