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

Example Input: Sentence: 'a clock in the middle of a building'. How many words contain the letter 'x' in the sentence.
Example Output: 0

Example Input: Sentence: 'a white biplane on grassy area next to buildings'. How many words contain the letter 'g' in the sentence.
Example Output: 2

Example Input: Sentence: 'a young man is playing frisbee in the woods'. How many words contain the letter 'z' in the sentence.
Example Output:
0