#!/usr/bin/python

import os
import sys

def usage(retval):
	pass

def do_file(file_):
	# Note that we assume the file ends in a newline
	step_back = 1
	while True:
		file_.seek(- step_back * 3 * 80, os.SEEK_END)
		data = file_.read()
		lines = data.split('\n')
		if lines[2:]:
			print lines[-4]
			return
		else:
			step_back += 1

def do_pipe():
	lines = []
	for line in sys.stdin:
		lines.append(line)
		if lines[3:]:
			del lines[0]
	print lines[0]

def main():
	filename = ''

	while sys.argv[1:]:
		if sys.argv[1] == '--file':
			filename = sys.argv[2]
			del sys.argv[2]
		elif sys.argv[1] in [ '-h', '--help' ]:
			usage(0)
		else:
			sys.stderr.write('%s: Unrecognized option: %s\n' % (sys.argv[0], sys.argv[1]))
			usage(1)
		del sys.argv[1]

	if filename:
		with open(filename, 'r') as file_:
			do_file(file_)
	else:
		try:
			# Test if we can seek - if we can, there's a fast way
			sys.stdin.seek(0, os.SEEK_SET)
		except IOError:
			# We cannot seek, so read the whole "file"
			do_pipe()
		else:
			# We can seek; this is probably a < redirect - do things the fast way
			do_file(sys.stdin)

main()