#include<bits/stdc++.h>
namespace {
#pragma GCC diagnostic ignored "-Wunused-function"
#include<atcoder/all>
#pragma GCC diagnostic warning "-Wunused-function"
using namespace std;
using namespace atcoder;
#define rep(i,n) for(int i = 0; i < (int)(n); i++)
#define rrep(i,n) for(int i = (int)(n) - 1; i >= 0; i--)
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; } else return false; }
template<class T> bool chmin(T& a, const T& b) { if (b < a) { a = b; return true; } else return false; }
using ll = long long;
using P = pair<int,int>;
using VI = vector<int>;
using VVI = vector<VI>;
using VL = vector<ll>;
using VVL = vector<VL>;

} int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n, m;
  cin >> n >> m;
  VVI to(n);
  VI deg(n);
  rep(_, m) {
    int u, v;
    cin >> u >> v;
    u--, v--;
    to[v].emplace_back(u);
    deg[u]++;
  }
  vector<char> dp(n, -1);
  VI todo;
  rep(i, n) if (deg[i] == 0) {
    dp[i] = 0;
    todo.emplace_back(i);
  }
  while (todo.size()) {
    int u = todo.back(); todo.pop_back();
    for (int v : to[u]) {
      deg[v]--;
      if (!dp[u]) {
        if (dp[v] == -1) {
          dp[v] = 1;
          todo.emplace_back(v);
        }
      } else {
        if (!deg[v]) {
          dp[v] = 0;
          todo.emplace_back(v);
        }
      }
    }
  }
  cout << (dp[0] == -1 ? "Draw" : dp[0] == 1 ? "Alice" : "Bob") << '\n';
}