z,*s=open(i:=0)
h,w=map(int,z.split())
while(j:=s[i].find('R'))<0:i+=1
while'.'==(c:=s[-~i%h][-~j%w]):i+=1;j+=1
print(f'{i%h+1} {j%w+1}'*(c<'R')or'loop')