#!/usr/bin/env ruby

OK_REGEX = /\s*OK - .*/
NG_REGEX = /\s*-- - .*/
LEADING_SPACE = /(^\s*)([^\s].*$)/

STDIN.each_line do |line|
  line.chomp!
  if line =~ OK_REGEX
    line.gsub!('OK - ', '-- - ')
    puts line
    next
  end
  if line =~ NG_REGEX
    line.gsub!('-- - ', 'OK - ')
    puts line
    next
  end
  puts line.gsub(LEADING_SPACE, '\1-- - \2')
end