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

Example Input: Sentence: 'a skier posing for a photo in front of a slope'. How many words contain the letter 'a' in the sentence.
Example Output: 3

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: 'a vase with a candle next to it sitting on a table'. How many words contain the letter 't' in the sentence.
Example Output:
6