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

Example Input: Sentence: 'two giraffes with their heads in the tree'. How many words contain the letter 'o' in the sentence.
Example Output: 1

Example Input: Sentence: 'a man that is sitting on a horse in the grass'. How many words contain the letter 'y' in the sentence.
Example Output: 0

Example Input: Sentence: 'a man and woman sitting on top of a bench near the ocean'. How many words contain the letter 'b' in the sentence.
Example Output:
1