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

Example Input: Sentence: 'a bird is standing on the edge of a book'. How many words contain the letter 'o' in the sentence.
Example Output: 3

Example Input: Sentence: 'a gray cat is wearing a santa hat'. How many words contain the letter 'm' in the sentence.
Example Output: 0

Example Input: Sentence: 'a woman standing by the door with two suitcases'. How many words contain the letter 'p' in the sentence.
Example Output:
0