h,w=map(int,input().split())
s=[input()for _ in[1]*h]
x=0
for i in range(h):
	x=s[i].find("R")
	if x>=0:
		y=i
		break
while 1:
	x=(x+1)%w
	y=(y+1)%h
	if s[y][x]!=".":
		print(y or h,x or w)
		break