#include <bits/stdc++.h>
using namespace std;

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int N,M; cin >> N >> M;
    vector<vector<int>> Graph(N),rev(N);
    for(int i=0; i<M; i++){
        int u,v; cin >> u >> v;
        u--; v--;
        Graph.at(u).push_back(v);
        rev.at(v).push_back(u);
    }
    vector<int> V(N);
    vector<bool> already(N);
    queue<int> Q;
    for(int i=0; i<N; i++){
        V.at(i) = Graph.at(i).size();
        if(V.at(i) == 0) already.at(i) = true,Q.push(i);
    }
    vector<int> win(N);
    while(Q.size()){
        int pos = Q.front(); Q.pop();
        if(!win.at(pos)){
            for(auto to : rev.at(pos)) win.at(to) = 1,Q.push(to);
        }
        else{
            for(auto to : rev.at(pos)) if(--V.at(to) == 0) win.at(to) = -1,Q.push(to);
        }
    }
    if(win.at(0) == 1) cout << "Alice\n";
    else if(win.at(0) == -1) cout << "Bob\n";
    else cout << "Draw\n";
}