#include<bits/stdc++.h>
using namespace std;
int main(){
    int h,w;
    cin>>h>>w;
    vector<vector<bool>>t(h,vector<bool>(w));
    int x,y,a,b,c,d;
    for(int i=0;i<h;i++){
        string s;cin>>s;
        for(int j=0;j<w;j++){
            t[i][j]=s[j]=='#';
            if(s[j]=='R')x=i,y=j;
        }
    }
    c=a=x++,d=b=y++;x%=h;y%=w;
    while(!t[x][y]&&(x!=a||y!=b)){
        c=x;d=y;
        x=(x+1)%h;y=(y+1)%w;
    }
    if(a==x&&b==y)cout<<"loop";
    else cout<<c+1<<" "<<d+1;
}