#include<bits/stdc++.h>
using namespace std;
int main(){
  int h,w;
  cin>>h>>w;
  vector<string> s(h);
  for(auto& s_i:s) cin>>s_i;
  int ri,rj;
  for(int i=0;i<h;i++) for(int j=0;j<w;j++){
    if(s[i][j]=='R'){
      ri=i;
      rj=j;
    }
  }
  vector memo(h,vector<int>(w,0));
  int i=ri,j=rj;
  while(true){
    memo[i][j]=1;
    int ni=(i+1)%h,nj=(j+1)%w;
    if(memo[ni][nj]) break;
    if(s[ni][nj]=='#') break;
    i=ni;
    j=nj;
  }
  if(s[(i+1)%h][(j+1)%w]=='#') cout<<i+1<<" "<<j+1<<endl;
  else cout<<"loop"<<endl;
}