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