./script.pl -w
The outer key(user) is user1. 
  The key(machine) is machine1: 
    The key is machine1key4,   the value is machine1value4.
    The key is machine1key1,   the value is machine1value1.
    The key is machine1key2,   the value is machine1value2.
    The key is machine1key3,   the value is machine1value3.