SecondMax/abrivan			SecondMax/Stephan
n	1	f_max = int(input())	n	1	x_max = int(input())
	2	s_max = int(input())		2	y_max = int(input())
	3			3
n	4	if f_max == s_max == 0:	n	4	if x_max == y_max == 0:
	5	print('Error')		5	print('Error')
n	6	elif s_max == 0:	n	6	elif y_max == 0:
	7	print('NO')		7	print('NO')
	8	else:		8	else:
n	9	if f_max < s_max:	n	9	if x_max < y_max:
	10	f_max, s_max = s_max, f_max		10	x_max, y_max = y_max, x_max
	11	elem = int(input())		11	elem = int(input())
	12	while elem != 0:		12	while elem != 0:
n	13	if elem > f_max:	n	13	if elem > x_max:
	14	s_max, f_max = f_max, elem		14	y_max, x_max = x_max, elem
	15	elif (elem > s_max) and (elem != f_max):		15	elif (elem > y_max) and (elem != x_max):
	16	s_max = elem		16	y_max = elem
	17	elem = int(input())		17	elem = int(input())
n	18	if f_max == s_max:	n	18	if x_max == y_max:
	19	print('NO')		19	print('NO')
	20	else:		20	else:
t	21	print(s_max)	t	21	print(y_max)
	22			22

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