b=[input() for i in range(int(input().split()[0]))]
X,Y=len(b[0]),len(b)
for i in range(X*Y):
 if b[i//X][i%X]=="R":y,x=i//X,i%X
for i in range(X*Y):
 y=(y+1)%Y;x=(x+1)%X
 if b[y][x]=="#":break
if b[y][x]=="#":print((y-1)%Y+1,(x-1)%X+1)
else:print("loop")