def ask a
  $stdout.puts a.join(' ')
  $stdout.flush
  x,y = gets.split.map(&:to_i)
  exit 0 if x == 4
  [x,y]
end

a = nil

[*0...10].combination(4).to_a.shuffle.each { |c|
  x,y = ask c
  if x == 0 && y == 0
    a = c
    break
  end
}

# 4.times { |i|
#   x = nil
#   10.times { |j|
#     next if a.include? j
#     a[i] = j
#     x,y = ask a
#     if x == i+1
#       break
#     end
#   }
# }