h,w=map(int,input().split())
s=[list(input())for _ in range(h)]
ri=rj=-1
for i in range(h):
  for j in range(w):
    if s[i][j]=='R':
      ri=i
      rj=j
memo=[[False]*w for _ in range(h)]
while not memo[ri][rj]:
  memo[ri][rj]=True
  ri=(ri+1)%h
  rj=(rj+1)%w
  if s[ri][rj]=='#':
    break
if s[ri][rj]=='#':
  print((ri-1)%h+1,(rj-1)%w+1)
else:
  print("loop")