cy = 0
cx = 0

STDOUT.puts("%d %d" % [cx, cy])
STDOUT.flush
current_d = gets.to_i

if current_d == 0
  exit
end

ok = 0
ng = 100_001

50.times do
  x = (ok + ng) / 2

  STDOUT.puts("%d %d" % [x, cy])
  STDOUT.flush
  d = gets.to_i

  if d == 0
    exit
  end

  if current_d >= d
    ok = x
    current_d = d
  else
    ng = x
  end
end

cx = ok
ok = 0
ng = 100_001

49.times do
  y = (ok + ng) / 2

  STDOUT.puts("%d %d" % [cx, y])
  STDOUT.flush
  d = gets.to_i

  if d == 0
    exit
  end

  if current_d >= d
    ok = y
    current_d = d
  else
    ng = y
  end
end