In this task your given two statements in Chinese. You must judge whether the second sentence is the cause or effect of the first one. Label the instances as "cause" or "effect" based on your judgment. The sentences are separated by a newline character.

Ex Input:
那人去找理发师。
他的头发变长了。

Ex Output:
cause


Ex Input:
罪犯自首了。
证据指向了他。

Ex Output:
cause


Ex Input:
这个女孩参加了她同学的生日聚会。
她收到了邀请。

Ex Output:

cause