#include <bits/stdc++.h>
using namespace std;
bool v[2000][2000];
main() {
  int H, W;
  cin >> H >> W;
  vector<string> S(H);
  for(int i = 0; i < H; i++) {
    cin >> S[i]; }
  int ri = -1, rj = -1;
  for(int i = 0; i < H; i++) {
    for(int j = 0; j < W; j++) {
      if(S[i][j] == 'R') {
        ri = i;
        rj = j;
        break;
      }
    }
  }
  bool f = false;
  while(!v[ri][rj]) {
    v[ri][rj] = true;
    ri++;
    if(ri == H) {
      ri = 0;
    }
    rj++;
    if(rj == W) {
      rj = 0;
    }
    if(S[ri][rj] == '#') {
      f = true;
      break;
    }
  }
  if(f) {
    cout <<(ri-1)%H+1<<" "<<(rj-1)%W+1<<endl;
  }
  else {
    cout << "loop" << endl;
  }
}