require 'set'
histo = Set.new []

def torai(a)
  puts a*' '
  STDOUT.flush
  gets.split.map(&:to_i)
end

def neigh(a)
  cs = (0..9).select{|i| not a.include?(i) }.to_a
  a[rand(4)] = cs[rand(cs.size)]
  return a
end

a = [0,1,2,3]
n,m = torai(a)
exit 0 if n == 4

k = n+m
for i in 0..4 do
  for x in 0..9 do
    if not a.include?(x)
      b = a.clone
      b[i] = x
      n,m = torai(b)
      if (n+m) == 4
        exit 0
      end
      if k < (n+m)
        k = n+m
        a = b
        break
      end
      if k > (n+m)
        break
      end
    end
  end
end

a.permutation(4) {|a,b,c,d|
  puts [a,b,c,d]*' '
  n,m=gets.split.map(&:to_i)
  if n==4
    exit 0
  end
}