#!/usr/bin/env ruby

require 'isna'

"\\1\e[0;0;34m<--- space\e[0m"
STDIN.each_line do |line|
  spaces = line.gsub(/([ ]+$)/, "[\\1]".to_ansi.negative.underline.red.blink.to_s + '<--- space'.to_ansi.red.to_s)
  tabs = spaces.gsub(/(\t+$)/, "\\1\e[0;0;41m<--- tab\e[0m")
  print tabs
end