Given a premise and two alternatives, choose the alternative that is a more plausible cause or effect of the situation described by the premise. The input format is "premise
(1)alternative_1(2)alternative_2", the output should either be "1" or "2" based on your judgment.

The boy wore braces.
(1)He got a cavity.(2)His teeth became straight.
2

I opened my eyes.
(1)I woke up.(2)I relaxed.
1

They travelers checked into their hotel room.
(1)They unpacked their suitcases.(2)They went to the airport.

1