H, W = map(int, input().split())
S = [input() for _ in range(H)]
ri = -1
rj = -1
for i in range(H):
  for j in range(W):
    if S[i][j] == 'R':
      ri = i
      rj = j
      break
visited = [[False] * W for _ in range(H)]
finished = False
while not visited[ri][rj]:
  visited[ri][rj] = True
  ri += 1
  if ri == H:
    ri = 0
  rj += 1
  if rj == W:
    rj = 0
  if S[ri][rj] == '#':
    finished = True
    break
if finished:
  ri -= 1
  if ri == -1:
    ri = H - 1
  rj -= 1
  if rj == -1:
    rj = W - 1
  print(ri + 1, rj + 1)
else:
  print("loop")