In this task, you're given four sentences of a story written in natural language in which one part is missing. Your job is to predict the position and missing part of the story and return in the following format: position, missing part. The missing part is a sentence that completes the story, and the position is the number of the missing sentence in the new story.

Sentence1: Sam hopped into his mail truck and drove off. Sentence2: He was trying to do his route fast to get home early today. Sentence3: He drove so fast he didn't see a pothole in the road. Sentence4: The truck bounced hard when he hit the pothole.
5, Sam's head hit the steering wheel.

Sentence1: Ally had been saving her spare coins in a jar for Years. Sentence2: She wanted a new cell phone but she didn't have enough money. Sentence3: She thought she'd count the change in her change jar. Sentence4: To her surprise, there was over $300 in the jar.
5, So she bought a new cell phone.

Sentence1: I woke up hungry. Sentence2: I poured a bowl of cereal but found I did not have any milk. Sentence3: After contemplating using water I decided to go to the store. Sentence4: I came home and ate cereal.

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
4, I walked to the corner and got a half gallon of 2%.

