#!/usr/bin/python

import sys

f = open(sys.argv[1])
n = int(sys.argv[2])

l = [[]]

for line in f:
	k = line.strip()
	l[-1].append(k)
	if len(l[-1]) == n:
		l.append([])

for i1 in range(len(l)):
	l1 = l[i1]
	for i2 in range(len(l1)):
		s = "[%d][%d] = %s" % (i1, i2, l1[i2])
		print s

f.close()