#include <stdio.h>
#include <string.h>
#include <math.h>
#define N 509

char a[N][N] = { "\0" };
int check[N][N] = { 0 };

int main() {
    int h, w;
    scanf("%d %d", &h, &w);
    for (int i = 0; i < h; i++) {
        scanf("%s", a[i]);
        getchar();
    }
    h--;
    w--;
    // printf("okk~\n");
    int i = 0, j = 0, ok = 1;
    while (ok == 1) {
        switch (a[i][j]) {
            case 'U':
                if (i == 0) {
                    ok = 0;  //输出此时的i，注意i的变换
                    break;
                } else {
                    i--;
                    if (check[i][j]) {
                        ok = 2;  //输出-1
                        break;
                    } else {
                        check[i][j]++;
                    }
                }
                break;
            case 'D':
                if (i == h) {
                    ok = 0;  //输出此时的i，注意i的变换
                    break;
                } else {
                    i++;
                    if (check[i][j]) {
                        ok = 2;  //输出-1
                        break;
                    } else {
                        check[i][j]++;
                    }
                }
                break;
            case 'L':
                if (j == 0) {
                    ok = 0;  //输出此时的i，注意i的变换
                    break;
                } else {
                    j--;
                    if (check[i][j]) {
                        ok = 2;  //输出-1
                        break;
                    } else {
                        check[i][j]++;
                    }
                }
                break;
            case 'R':
                if (j == w) {
                    ok = 0;  //输出此时的i，注意i的变换
                    break;
                } else {
                    j++;
                    if (check[i][j]) {
                        ok = 2;  //输出-1
                        break;
                    } else {
                        check[i][j]++;
                    }
                }
                break;
        }
    }
    if (ok == 0)
        printf("%d %d", i + 1, j + 1);
    else if (ok == 2)
        printf("-1");
    return 0;
}