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

Example Input: Sentence: 'an elephant stands in the grass near a tree'. How many words contain the letter 'c' in the sentence.
Example Output: 0

Example Input: Sentence: 'a man driving with his dog in the back seat'. How many words contain the letter 't' in the sentence.
Example Output: 3

Example Input: Sentence: 'a close up of slices of bread on a table near a spoon'. How many words contain the letter 'a' in the sentence.
Example Output:
6