In this task, you will use your knowledge about language (and common sense) to determine what element the marked number refers to. The numbers are marked with two underlines around them, like: _ number _. Your answer should be chosen from the given text, and should not contain other words.

Example Input: Angel of Destiny:  There 's one more battle on the horizon for you three . One unlike you 've ever faced before , _ one _ you wo n't see coming , and one you may not survive .
Piper Halliwell: What does that have to do with Leo ?
Angel of Destiny: The loss , the pain will motivate you , all of you to fight , without which you will have no chance to prevail .
Piper Halliwell: Wo n't you please try to let us find a way to do this without Leo dying ?
Angel of Destiny: What exactly do you have in mind ?
Example Output: battle

Example Input: Reverend Will Dexter:  Every day , here and at home , we are warned about the enemy . But who is the enemy ? Is it the alien ? Well , we are all alien to one another . Is it the one who believes differently than we do ? No , oh no , my friends . The enemy is fear . The enemy is ignorance . The enemy is the _ one _ who tells you that you must hate that which is different . Because , in the end , that hate will turn on you . And that same hate will destroy you .
Example Output: enemy

Example Input: Yinsen:  That does n't look like the Jericho missile .
Tony Stark: That 's because it is a miniaturized arc reactor . I 've got a big _ one _ powering my factory at home .
Yinsen: What will it generate ?
Tony Stark: If my math is right - and it always is - three gigajoules per second .
Yinsen: That could run your heart for fifty lifetimes !
Tony Stark: Yeah ... or something big for fifteen minutes .
Example Output:
reactor