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

Example Input: Sentence: 'an untidy room with clothes bottles next to an oven'. How many words contain the letter 'a' in the sentence.
Example Output: 2

Example Input: Sentence: 'unusual round vase with flower stems inside it'. How many words contain the letter 'c' in the sentence.
Example Output: 0

Example Input: Sentence: 'a room photographed in black and white with older looking furnishings'. How many words contain the letter 'e' in the sentence.
Example Output:
3