#!/usr/bin/env ruby

require 'Newick'
require 'optparse'

ARGV.options {|opts|
  opts.banner << " tree-file [..tree-file]"
  begin
    opts.parse!
  rescue
    STDERR.puts $!.message
    STDERR.puts opts
    exit(1)
  end
  if (ARGV.size < 1)
    STDERR.puts opts
    exit(1)
  end
}


ARGV.each {|arg|
  tree = NewickTree.fromFile(arg)
  tree.taxa.each {|taxon|
    printf("%s\n", taxon)
  }
}