#!/usr/bin/ruby

# arguments: delimiter column ...
# split each line at delimiter character and only display selected parts.
# column can be an integer or a range. examples: 1..3, ..2, 1..
# selected parts are displayed separated by spaces.

delimiter = Regexp.new Regexp.escape(ARGV[0]) + "+"
ranges = ARGV[1..-1].map {|a|
  if a.include?("..")
    start, stop = a.split("..").map {|v| v.empty? ? nil : v.to_i}
    {start: start || 0, stop: stop}
  else
    {start: a.to_i, stop: a.to_i}
  end
}

$stdin.each_line {|line|
  parts = line.split(delimiter)
  selected = ranges.flat_map {|r|
    (r[:start]..(r[:stop] || parts.size - 1)).map {|i| parts[i] || ""}
  }
  puts selected.join(" ").strip
}