#include <bits/stdc++.h>
using namespace std;

int main(void){
	int H,W,i,j;
	cin >> H >> W;
	vector<string> s(H);
	for(i=0;i<H;i++) cin >> s[i];
	int x=-1,y=-1;
	for(i=0;i<H;i++){
		for(j=0;j<W;j++){
			if(s[i][j]=='R'){
				x=i;
				y=j;
				break;
			}
		}
		if(x!=-1 && y!=-1) break;
	}
	int p=x,q=y;
	while(1){
		if(p+1<H) p++;
		else p=0;
		if(q+1<W) q++;
		else q=0;
		if(s[p][q]=='#'){
			if(p!=0) p--;
			else p=H-1;
			if(q!=0) q--;
			else q=W-1;
			cout << p+1 << ' ' << q+1 << endl;
			return 0;
		}
		if(p==x && q==y){
			cout << "loop" << endl;
			return 0;
		}
	}
	return 0;
}