#split 7
from sys import stdin
the_str = ""
while(True):
	new_char = stdin.read(1)
	if new_char == '' and test_candidate == '':
		break
	test_candidate = the_str + new_char
	if int(test_candidate) % 7:
		#print test_candidate, "is a multiple of 7 continuing"
		the_str = test_candidate
	else:
		#print "adding", new_char, "didnt work, printing previous candidate"
		print test_candidate
		the_str = ''