def try(arr)
  $stdout.puts arr.join(' ')
  $stdout.flush
  x,y = gets.split.map(&:to_i)
  [x,y]
end

fst = 0

[2, 4, 6, 8].each do |i|
  fst += try([0,1,i,i + 1]).reduce(:+)
  puts fst
end

if fst == 4
  sets = [[2, 3], [4, 5], [6, 7], [8, 9]]
elsif fst == 7
  sets = [[0, 1], [2, 3], [4, 5], [6, 7]]
elsif fst == 10
  sets = [[0, 0], [1, 1], [2, 3], [6, 7]]
end

nums = []

raise "#{nums}"

4.times do |i|
  arr = [sets[0][0], sets[1][0], sets[2][0], sets[3][0]]
  fb1 = try(arr).reduce(:+)
  arr[i] = sets[i][1]
  fb2 = try(arr).reduce(:+)
  if fb2 > fb1
    nums.push(sets[i][1])
  else
    nums.push(sets[i][0])
  end
end

nums.permutation(4).each do |arr|
  res = try(arr)
  break if res == [4,0]
end