#include<cstdio>
int h,w,i,j,x,y;char*t="%d %d",s[1002][1002];main(){scanf(t,&h,&w);for(i=0;i<h;)scanf("%s",s+i++);for(i=h;i--;)for(j=w;j--;)if(s[i][j]=='R')for(y=i,x=j;s[y=++y%h][x=++x%w]=='.';);s[y][x]-'R'?printf(t,y?y:h,x?x:w):puts("loop");}