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

Example Input: Sentence: 'a woman standing in the dirt looking up at an elephant'. How many words contain the letter 'b' in the sentence.
Example Output: 0

Example Input: Sentence: 'the tennis player returns a serve of the tennis ball'. How many words contain the letter 'q' in the sentence.
Example Output: 0

Example Input: Sentence: 'elephant playing with large ball in outdoor zoo enclosure'. How many words contain the letter 'x' in the sentence.
Example Output:
0