h,w=map(int,input().split())
t=[input() for _ in range(h)]
for i in range(h):
 if 'R'in t[i]:p,q=i,t[i].index('R')
while t[x:=(p+1)%h][y:=(q+1)%w]=='.':
 p,q=x,y
print('loop'if t[x][y]=='R'else f'{p+1} {q+1}')