#include<bits/stdc++.h>
using namespace std;
char c[505][505];
bool v[505][505];
int main(){
	int h,w;
	cin>>h>>w;
	for(int i=1;i<=h;i++){
		for(int j=1;j<=w;j++){
			cin>>c[i][j];
		}
	}
	int x=1,y=1;
	while(1){
		v[x][y]=1;
		if(c[x][y]=='U' and x!=1){
			x--;
			if(v[x][y]==1){
				cout<<"-1";
				break;
			}
		}
		else if(c[x][y]=='D' and x!=h){
			x++;
			if(v[x][y]==1){
				cout<<"-1";
				break;
			}
		}
		else if(c[x][y]=='L' and y!=1){
			y--;
			if(v[x][y]==1){
				cout<<"-1";
				break;
			}
		}
		else if(c[x][y]=='R' and y!=w){
			y++;
			if(v[x][y]==1){
				cout<<"-1";
				break;
			}
		}
		else{
			cout<<x<<" "<<y;
			break; 
		}
	}
	return 0;
}