import sys
def request(s):
	print s
	sys.stdout.flush()
	return raw_input()
k=["{0:0>4}".format(i)for i in range(10000)]
k=[i for i in k if len(set(i))==4]
def l(a,b):
	r=[0,0]
	for i in range(4):
		if a[i] in b:
			if a[i]==b[i]:
				r[0]+=1
			else:
				r[1]+=1
	return r
while 1:
	t=k.pop()
	x,y=map(int,request(t).split())
	if x==4:
		break
	k=[i for i in k if l(t,i)==[x,y]]
	#print k