import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int m = sc.nextInt();
        ArrayList<Integer>[] g = new ArrayList[n];
        ArrayList<Integer>[] rg = new ArrayList[n];
        for (int i=0; i<n; i++) {
            g[i] = new ArrayList<>();
            rg[i] = new ArrayList<>();
        }
        int out[] = new int[n];
        for (int i=0; i<m; i++) {
        	int x = sc.nextInt();
        	int y = sc.nextInt();
        	x--; y--;
        	g[x].add(y);
        	rg[y].add(x);
        	out[x]++;
        }
		int[] alice = new int[n];
        int[] bob = new int[n];
        int[] alicecnt = new int[n];
        int[] bobcnt = new int[n];
        for (int i=0; i<n; i++) {
            alicecnt[i] = out[i];
            bobcnt[i] = out[i];
        }
        ArrayDeque<Integer> q = new ArrayDeque<>();
        for (int i=0; i<n; i++) {
            if (out[i] == 0) {
                if (alice[i] == 0) { alice[i] = 2; q.add(i*2); }
                if (bob[i] == 0) { bob[i] = 2; q.add(i*2+1); }
            }
        }
        while (!q.isEmpty()) {
            int cur = q.poll();
            int i = cur / 2;
            int p = cur % 2;
            if (p==0&&alice[i]==2 || p!=0&&bob[i]==2) {
                for (int u : rg[i]) {
                    if (p!=0) {
                        if (alice[u] == 0) {
                            alice[u] = 1;
                            q.add(u*2);
                        }
                    } else {
                        if (bob[u] == 0) {
                            bob[u] = 1;
                            q.add(u*2+1);
                        }
                    }
                }
            } else if (p==0&&alice[i]==1 || p!=0&&bob[i]==1) {
                for (int u : rg[i]) {
                    if (p!=0) {
                        if (alice[u]!=0) continue;
                        if (--alicecnt[u] == 0) {
                            alice[u] = 2;
                            q.add(u*2);
                        }
                    } else {
                        if (bob[u]!=0) continue;
                        if (--bobcnt[u] == 0) {
                            bob[u] = 2;
                            q.add(u*2+1);
                        }
                    }
                }
            }
        }
        if (alice[0] == 1) System.out.println("Alice");
        else if (alice[0] == 2) System.out.println("Bob");
        else System.out.println("Draw");
    }
}