#!/usr/bin/env ruby

lines = {}

TIMESTAMP_REGEX = /[0-9]{10}\.\d+/

STDIN.each_line do |line|
  if line =~ TIMESTAMP_REGEX 
    timestamp = line.scan(TIMESTAMP_REGEX)[0]
    lines[timestamp] = line
  end
end

lines.keys.sort.each do |timestap|
  puts lines[timestap].chomp
end