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

Example Input: Sentence: 'a jet airliner carrying a small shuttle above it'. How many words contain the letter 'r' in the sentence.
Example Output: 2

Example Input: Sentence: 'a batter sings his bat at a baseball game'. How many words contain the letter 'h' in the sentence.
Example Output: 1

Example Input: Sentence: 'a traffic light is in front of a large building'. How many words contain the letter 'x' in the sentence.
Example Output:
0