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.

Ex Input:
Sentence1: Karen and Diane had been best friends since childhood. Sentence2: Now high school seniors, they've started thinking about college. Sentence3: They both applied to Cornell and planned to room together. Sentence4: It was hard, but they agreed to go their separate ways.

Ex Output:
4, Karen was accepted but Diane was not, which was hard for both of them.

Ex Input:
Sentence1: Sally entered a contest online and won some gift cards. Sentence2: Sally got them in the mail a few days later. Sentence3: She went online and decided what she'd like to buy. Sentence4: She found a cool item and then happily bought it.

Ex Output:
2, The person in charge of prizes got her address and mailed them out.

Ex Input:
Sentence1: Amy always wanted to play the flute. Sentence2: The first day of band she told the teacher so. Sentence3: It was terribly hard to play the flute. Sentence4: Amy was very committed.

Ex Output:
3, She practiced on her flute everyday for a week.