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.

Q: Lucky:  I know you 're smart , Spot , but how do you handle pressure ? Solve this simple word problem in say , thirty seconds .
Spot: Ah - ha , no problem ! Two trains are heading toward each other , _ one _ at twenty - five miles an hour and the other at forty . They 're fifty miles apart and getting closer on the same track , but with no time to throw the switch , they collide , head on . All aboard perish and it 's all my fault !
Lucky: Next .

A: trains
****
Q: John Smith:  I 'm surprised you are n't mad at me ... I thought you might hold it against me for killing _ 3 _ of your guys .
Doyle: It 's the only cure I know for being stupid .

A: guys
****
Q: Duke Phillips:  I 'm giving you five days of my time to turn you around .
Jay Sherman: Well , what if five days is n't enough ?
Duke Phillips: Son , I only spent three days with a young man named Bill Clinton , and look at him now !
Jay Sherman: Maybe you should 've taken _ four _ .
Duke Phillips: Yeah ...

A:
days
****