import sys
import random
k=sorted([i for i in["{0:0>4}".format(i)for i in range(10000)]if len(set(i))==4],key=lambda x:random.random())
for _ in range(5040):
	print k[0]
	sys.stdout.flush()
	s=raw_input()
	if s=="4 0":
		break
	elif s=="0 0":
		k=[i for i in k if not(i[0]in k[0]or i[1]in k[0]or i[2]in k[0]or i[3]in k[0])]
	elif s=="0 4":
		k=[i for i in k if i[0]in k[0]and i[1]in k[0]and i[2]in k[0]and i[3]in k[0]]
	else:
		k=[i for i in k if i[0]in k[0]or i[1]in k[0]or i[2]in k[0]or i[3]in k[0]]
	k.pop(0)
	#print len(k)
	if len(k)==0:
		break