Instructions: In this task, you're given the title of a five-sentence story and the first four sentences. Your job is to write the last sentence of the story such that it seamlessly connects with the rest of the story.
Input: Title: Numbers. Sentence 1: I was teaching my son some numbers. Sentence 2: He could only count to three. Sentence 3: I held up four of my fingers. Sentence 4: He thought about it real hard.
Output:
He did not know what number that was.