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

Example Input: Sentence: 'looking out a window at a tall building with a clock on the face'. How many words contain the letter 'l' in the sentence.
Example Output: 4

Example Input: Sentence: 'a rack full of clothes in a small bedroom'. How many words contain the letter 'o' in the sentence.
Example Output: 3

Example Input: Sentence: 'a kid is holding a tennis racket on a court'. How many words contain the letter 'k' in the sentence.
Example Output:
2