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: 'a man and woman posing in front of a truck'. How many words contain the letter 'c' in the sentence.
Example Output: 1

Example Input: Sentence: 'smooth top stove with exhaust fan that has light turned on'. How many words contain the letter 'r' in the sentence.
Example Output:
1