#include <bits/stdc++.h>
using namespace std;
int H,W,i,j;
int main(){cin>>H>>W;vector<string> S(H);for(i=0;i<H;i++){cin>>S[i];}int ri=-1,rj=-1;for(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;}}