#import<bits/stdc++.h>
using namespace std;
int 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;
      }
  vector<vector<bool>> visited(H, vector<bool>(W, false));
  bool finished=false;
  while(!visited[ri][rj]) {
    visited[ri][rj] = true;ri++;
    if(ri == H) ri = 0;
    rj++;
    if(rj == W) rj = 0;
    if(S[ri][rj] == '#') {
      finished = true;
      break;
    }
  }
  if(finished) {
    ri--;
    if(ri == -1) {
      ri = H - 1;
    }
    rj--;
    if(rj == -1) {
      rj = W - 1;
    }
    cout << ri + 1 << " " << rj + 1 << endl;
  }
  else {
    cout << "loop" << endl;
  }
}