In this task, you are given a premise sentence, two possible options and a question word. If the question was cause you should select the option that is a possible cause of the premise sentence, and if the question word was effect you should find the option which is a possible effect of the premise sentence. Answer with "A" or "B".

Ex Input:
My mailbox was overflowing with letters. (A) The lid on the mailbox broke. (B) I went on vacation for two weeks., Question: cause

Ex Output:
B


Ex Input:
My feet were blistered. (A) I went hiking. (B) I went swimming., Question: cause

Ex Output:
A


Ex Input:
The climbers reached the peak of the mountain. (A) They encountered an avalanche. (B) They congratulated each other., Question: effect

Ex Output:

B