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

using isize = size_t;
using i32 = int;
using u32 = unsigned int;
using i64 = long long;
using u64 = unsigned long long;
using i128 = __int128_t;
using u128 = __uint128_t;
using f64 = long double;
using p2 = pair<i64, i64>;
using el = tuple<i64, i64, i64>;
using mint = atcoder::modint998244353;

void _main();
int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  cout << fixed << setprecision(18);
  _main();
}

i64 pow(i64 x, i64 n) {
  i64 res = 1;
  i64 t = x;
  while (n > 0) {
    if (n & 1) {
      res = res * t;
    }
    t = t * t;
    n >>= 1;
  }
  return res;
}
i64 pow(i64 x, i64 n, i64 m) {
  i64 res = 1;
  i64 t = x % m;
  while (n > 0) {
    if (n & 1) {
      res = res * t % m;
    }
    t = t * t % m;
    n >>= 1;
  }
  return res;
}

void _main() {
  i64 n, m;
  cin >> n >> m;
  vector<vector<i64>> g(n), h(n);
  vector<i64> dp(n, 1);
  vector<i64> cnt(n, 0);
  for (i64 i = 0; i < m; i++) {
    i64 u, v;
    cin >> u >> v;
    u--, v--;
    g[u].push_back(v);
    h[v].push_back(u);
    cnt[u]++;
  }
  vector<i64> stack;
  for (i64 i = 0; i < n; i++) if (cnt[i] == 0) stack.push_back(i);
  while (!stack.empty()) {
    i64 i = stack.back();
    stack.pop_back();
    for (i64 ni : g[i]) {
      if (dp[ni] == 0) dp[i] = 2;
    }
    if (dp[i] != 2) dp[i] = 0;
    if (dp[i] == 0) {
      for (i64 ni : h[i]) {
        if (cnt[ni] > 0) stack.push_back(ni);
        cnt[ni] = -1;
      }
    }
    for (i64 ni : h[i]) {
      cnt[ni]--;
      if (cnt[ni] == 0) stack.push_back(ni);
    }
  }
  cout << (dp[0] == 0 ? "Bob\n" : dp[0] == 1 ? "Draw\n" : "Alice\n");
}