H,W=map(int,input().split());S=[input()for _ in range(H)];I=J=-1
for i in range(H*W):
 if S[i//W][i%W] == 'R':
  I=i//W
  J=i%W
v=[[0]*W for _ in range(H)]
f=0
while not v[I][J]:
 v[I][J]=1
 I=(I+1)%H
 J=(J+1)%W
 if S[I][J]=='#':
  I-=1
  if I==-1:
    I=H-1
  J-=1
  if J==-1:
    J=W-1
  print(I+1,J+1)
  exit()
print("loop")