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

Example Input: Sentence: 'a kitchen with hard wood floors and a stove top oven'. How many words contain the letter 'g' in the sentence.
Example Output: 0

Example Input: Sentence: 'black and white photograph of a man using a cell phone on the street'. How many words contain the letter 'r' in the sentence.
Example Output: 2

Example Input: Sentence: 'there are people on motor bikes in the street'. How many words contain the letter 'k' in the sentence.
Example Output:
1