import sys

MAX_RUNS = 10
DIMENSION = 1000

# make recursion depth large enough so that width and length of the eggs-square fits in
sys.setrecursionlimit(2*DIMENSION + sys.getrecursionlimit())

def find_max_path(eggs, x, y, cached_result = None):
    if cached_result is None:
        cached_result = dict()

    if (x,y) in cached_result:
        return cached_result[(x,y)]

    right_result = None
    if x+1 < DIMENSION:
        right_result = find_max_path(eggs, x+1, y, cached_result)

    down_result = None
    if y+1 < DIMENSION:
        down_result = find_max_path(eggs, x, y+1, cached_result)

    if right_result is None and down_result is None:
        cached_result[(x,y)] = ('', eggs[y][x])
        return ('', eggs[y][x])

    if down_result is not None and (right_result is None or down_result[1] > right_result[1]):
        result = ('d' + down_result[0], eggs[y][x] + down_result[1])
        cached_result[(x,y)] = result
        return result

    if right_result is not None and (down_result is None or right_result[1] > down_result[1]):
        result = ('r' + right_result[0], eggs[y][x] + right_result[1])
        cached_result[(x,y)] = result
        return result

f = open("backfrombrazil.log", "w")

success = True

# read first input for run
received_reply = input()
f.write("< " + received_reply + "\n")

for run in range(MAX_RUNS):
    received_rows = []
    for i in range(DIMENSION):
        received_rows.append(received_reply)

        received_reply = input()
        f.write("< " + received_reply + "\n")

    eggs = []
    for received_row in received_rows:
        row = list(map(
            lambda s: int(s), 
            received_row.split(" ")[:-1]
        ))
        eggs.append(row)

    (path, sum_value) = find_max_path(eggs, 0, 0)
    print(path)
    f.write("> " + path + "\n")

    if "still in brazil" in received_reply or "didn't find" in received_reply or "out of time" in received_reply:
        success = False
        break

    # read first input for next run
    received_reply = input()
    f.write("< " + received_reply + "\n")

if success:
    received_reply = input()
    print(received_reply, file=sys.stderr)
    f.write("< " + received_reply + "\n")

    received_reply = input()
    print(received_reply, file=sys.stderr)
    f.write("< " + received_reply + "\n")

f.close()