_,*S=open(x:=0)
H,W=len(S),len(S[0])-1
while(y:=S[x].find('R'))<0:x+=1
while'.'==(c:=S[(t:=-~x%H)][-~y%W]):x=t;y=-~y%W
print(f'{x+1} {y+1}'if'R'>c else'loop')