#yuki_305
import sys

s='0000000000'
print s
sys.stdout.flush()
num,stat=raw_input().split()
if stat=='unlocked':
 sys,exit()
for i in xrange(10):
 for j in xrange(10):
  if s[i]==str(j):
   continue
  print s[:i]+str(j)+s[i+1:]
  sys.stdout.flush()
  num2,stat=raw_input().split()
  if stat=='unlocked':
   sys.exit()
  if int(num)<int(num2):
   s=s[:i]+str(j)+s[i+1:]
   num=num2
   break
  if int(num)>int(num2):
   break