#!/usr/bin/ruby

# arguments: delimiter index ...
# split each line at delimiter character and only display selected parts. displayed parts are separated by spaces.

delimiter = Regexp.new Regexp.escape(ARGV[0]) + "+"
indices = ARGV[1..-1].map &:to_i

$stdin.each_line {|a|
  a = a.split delimiter
  b = indices.map {|i| a[i] || ""}
  puts b.join(" ").strip
}