H=len(S:=[*open(x:=0)])-1;W=len(S[1])-1
while(y:=S[x].find('R')+1)<1:x+=1
while'.'==(c:=S[x%H+1][y%W]):x=x%H+1;y=y%W+1
print(f'{x} {y}'if'R'>c else'loop')