H,W=list(map(int,input().split()))
MAP=[input().strip() for i in range(H)]
for i in range(H):
    for j in range(W):
        if MAP[i][j]=="R":
            x=i
            y=j
for tests in range(10**6):
    if MAP[(x+1)%H][(y+1)%W]!="#":
        x=(x+1)%H
        y=(y+1)%W
    else:
        print(x+1,y+1)
        break
else:
    print("loop")