Георгий Попандопуло, 520 группа PokeMon 7715			Пахненко Иван 516 PokeMon 7042
t			t	1	"""
				2	0 / Misdreavus
				3	Svjatoslav Devjatkov / 3
				4	2 / Yamask
				5	Vsevid Mladenov / 1
				6	1 / Keldeo
				7	0 / Keldeo
				8	1 / Misdreavus
				9	2 / Scatterbug
				10	0 / Crawdaunt
				11	2 / Keldeo
				12	1 / Vanillite
				13	Svjatoslav Devjatkov / 0
				14	2 / Gardevoir
				15	Neljub Mstislavin / 2
				16	2 / Crawdaunt
				17	0 / Yamask
				18	3 / Reshiram
				19	"""
	1	card_name = {}		20	card_name = {}
	2	people_card = {}		21	people_card = {}
	3			22
	4	def check_int(s):		23	def check_int(s):
	5	try:		24	try:
	6	int(s)		25	int(s)
	7	return True		26	return True
	8	except:		27	except:
	9	return False		28	return False
	10	while True:		29	while True:
	11	cur_str = input().split(' / ')		30	cur_str = input().split(' / ')
	12	if cur_str == ['']:		31	if cur_str == ['']:
	13	break		32	break
	14	if check_int(cur_str[0]):		33	if check_int(cur_str[0]):
	15	cur_str[0] = int(cur_str[0])		34	cur_str[0] = int(cur_str[0])
	16	if cur_str[0] not in card_name:		35	if cur_str[0] not in card_name:
	17	card_name[cur_str[0]] = set()		36	card_name[cur_str[0]] = set()
	18	card_name[cur_str[0]].add(cur_str[1])		37	card_name[cur_str[0]].add(cur_str[1])
	19	else:		38	else:
	20	cur_str[1] = int(cur_str[1])		39	cur_str[1] = int(cur_str[1])
	21	if cur_str[0] not in people_card:		40	if cur_str[0] not in people_card:
	22	people_card[cur_str[0]] = set()		41	people_card[cur_str[0]] = set()
	23	people_card[cur_str[0]].add(cur_str[1])		42	people_card[cur_str[0]].add(cur_str[1])
	24	people_count = {}		43	people_count = {}
	25	max_count = 0		44	max_count = 0
	26	for i in people_card.keys():		45	for i in people_card.keys():
	27	cur_set = set()		46	cur_set = set()
	28	for j in people_card[i]:		47	for j in people_card[i]:
	29	cur_set.update(card_name[j])		48	cur_set.update(card_name[j])
	30	temp = len(cur_set)		49	temp = len(cur_set)
	31	people_count[i] = temp		50	people_count[i] = temp
	32	if temp > max_count:		51	if temp > max_count:
	33	max_count = temp		52	max_count = temp
	34	for i in sorted(people_count):		53	for i in sorted(people_count):
	35	if people_count[i] == max_count:		54	if people_count[i] == max_count:
	36	print(i)		55	print(i)

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