#!/usr/bin/env python

import sys
import re

if len(sys.argv) == 3:
	discardPattern = sys.argv[1]
	numLinesPerKlump = int(sys.argv[2])
else: 
	raise SystemExit("Usage: " + sys.argv[0] + " discardPattern numLinesPerKlump")

discardMatcher = re.compile(discardPattern)
	
storedLines = []
discardKlump = False
for line in sys.stdin:
	discardKlump |= discardMatcher.search(line) != None
	storedLines.append(line)
	if numLinesPerKlump == len(storedLines):
		if not discardKlump:
			for storedLine in storedLines:
				print storedLine,
		storedLines = []
		discardKlump = False