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: 'the street corner is flooded deep with water'. How many words contain the letter 'f' in the sentence.
Example Output: 1

Example Input: Sentence: 'a zebra a giraffe and a rhinoceros stand in an enclosed area'. How many words contain the letter 'h' in the sentence.
Example Output:
1