In this task, you're given four sentences of a story written in natural language. The given story is not complete and your job is to complete the story by selecting one of the sentence choices from (A) and (B), such that the story sounds fully coherent.

Ex Input:
Sentence1: I have a favorite pair of socks. Sentence2: Last week I was doing laundry. Sentence3: One of the two was lost. Sentence4: I looked everywhere and couldn't find it.
(A) All my socks were accounted for. (B) Eventually it turned up.

Ex Output:
B

Ex Input:
Sentence1: Kim saw a mother unloading her shopping cart in a parking lot. Sentence2: The mother's little toddler was sitting in the cart's child seat. Sentence3: Suddenly, while the mother was turned, the cart started rolling away! Sentence4: Kim, realizing the child was in great danger, lunged toward the cart.
(A) KIm breathlessly saved the child. (B) Kim saved the cart but let the child go.

Ex Output:
A

Ex Input:
Sentence1: One day Matilda was extremely bored. Sentence2: So she picked a name and address out of the phone book. Sentence3: She wrote a silly letter to that random person. Sentence4: And the recipient wrote back to Matilda!
(A) Matilda then got a letter from her brother. (B) Matilda was told to not write to them anymore.

Ex Output:
B