#include <cstdio>
#include <vector>
#include <map>
#include <cassert>
#include <queue>

using namespace std;

const int N = 1010;

struct D {
	int row, col, cost;

	D(int row, int col, int cost) : row(row), col(col), cost(cost) {}
};

void display(int rows, int cols, int g[][N][N]) {
	puts("--- row ---");
	for (int i = 0; i < rows; i++) {
		for (int j = 0; j < cols; j++) {
			printf(" %d", g[0][i][j]);
		}
		puts("");
	}
	puts("--- col ---");
	for (int i = 0; i < rows; i++) {
		for (int j = 0; j < cols; j++) {
			printf(" %d", g[1][i][j]);
		}
		puts("");
	}
}

int calc(int rows, int cols, int g[][N][N]) {
	queue<D> q;
	q.push(D(0, 0, 0));

	static int used[N][N] = {};
	while (!q.empty()) {
		D d = q.front(); q.pop();

		// printf("r:%d c:%d cost:%d\n", d.row, d.col, d.cost);

		if (d.row == rows-1 && d.col == cols-1) return d.cost;
		if (used[d.row][d.col]++) continue;

		// 上
		if (d.row > 0 && g[0][d.row-1][d.col] > 0)
			q.push(D(d.row-1, d.col, d.cost+1));

		// 下
		if (d.row+1 < rows && g[0][d.row][d.col] > 0)
			q.push(D(d.row+1, d.col, d.cost+1));

		// 右
		if (d.col+1 < cols && g[1][d.row][d.col] > 0)
			q.push(D(d.row, d.col+1, d.cost+1));

		// 左
		if (d.col > 0 && g[1][d.row][d.col-1] > 0)
			q.push(D(d.row, d.col-1, d.cost+1));
	}

	return -1;
}

int main() {
	int w, h, n;
	scanf("%d %d %d", &w, &h, &n);

	static int g[2][N][N] = {}; // [行or列どちら方向か][行][列]

	vector<pair<int, int> > cmap;
	for (int i = 0; i < h; i++)
		for (int j = 0; j < w; j++)
			cmap.push_back(make_pair(i, j));

	for (int i = 0; i < n; i++) {
		int m;
		scanf("%d", &m);

		int fm;
		scanf("%d", &fm);
		for (int j = 0; j < m; j++) {
			int to;
			scanf("%d", &to);
			// printf("%d -> %d\n", fm, to);

			int r1 = cmap[fm].first;
			int c1 = cmap[fm].second;
			int r2 = cmap[to].first;
			int c2 = cmap[to].second;

			// printf("(%d %d) -> (%d %d)\n", r1, c1, r2, c2);
			if (r1 != r2) {
				assert(c1 == c2);
				int fm = min(r1, r2);
				int to = max(r1, r2);
				g[0][fm][c1]++;
				g[0][to][c1]--;
			}
			else if (c1 != c2) {
				assert(r1 == r2);
				int fm = min(c1, c2);
				int to = max(c1, c2);
				g[1][r1][fm]++;
				g[1][r1][to]--;
			}
			else assert(false);

			fm = to;
		}
	}

	// 行方向を足し上げる
	for (int c = 0; c < w; c++) {
		for (int r = 1; r < h; r++) {
			g[0][r][c] += g[0][r-1][c];
		}
	}

	// 列方向を足し上げる
	for (int r = 0; r < h; r++) {
		for (int c = 1; c < w; c++) {
			g[1][r][c] += g[1][r][c-1];
		}
	}

	// display(h, w, g);

	int ans = calc(h, w, g);
	if (ans == -1) {
		puts("Odekakedekinai..");
	}
	else {
		printf("%d\n", ans);
	}
}