#import<ios>
char c[1000000];int h,w,i,j,a,r;main(){scanf("%d%d",&h,&w);for(;i<h*w;i+=w)scanf("%s",&c[i]);for(;j<h*w;j++)r=a=c[j]=='R'?j:a;for(;a+=w+1,a-=a%w?0:w,a%=h*w,c[a]!='#';r=a)if(c[a]=='R'){puts("loop");exit(0);}printf("%d %d",r/w+1,r%w+1);}