import sys
from collections import deque
from typing import List, Tuple

sys.setrecursionlimit(10 ** 6)

MOD = 998244353

int1 = lambda x: int(x) - 1
input = lambda: sys.stdin.readline().rstrip('\n')
ii = lambda: int(input())
vi = lambda: list(map(int, input().split()))
vi1 = lambda: list(map(int1, input().split()))


def dbg(*args, **kwargs):
    print(*(repr(arg) for arg in args), *(f'{k}: {repr(v)}' for k, v in kwargs.items()),
          sep='; ', file=sys.stderr, flush=True)


def main():
    n, m = vi()

    rev = [[] for _ in range(n)]
    fwd = [[] for _ in range(n)]
    odeg = [0] * n
    q = deque()

    for _ in range(m):
        u, v = vi1()
        fwd[u].append(v)
        rev[v].append(u)
        odeg[u] += 1

    ans = [None] * n

    for i in range(n):
        if odeg[i] == 0:
            q.append(i)

    while q:
        u = q.popleft()
        for v in fwd[u]:
            if ans[v] == False:
                ans[u] = True
                break
        else:
            ans[u] = False

        for v in rev[u]:
            odeg[v] -= 1
            if odeg[v] >= 0 and (odeg[v] == 0 or ans[u] == False):
                odeg[v] = -1
                q.append(v)

    if ans[0] is None:
        return 'Draw'

    return 'Alice' if ans[0] else 'Bob'


def _start():
    if (ret := main()) is not None:
        print(*ret) if isinstance(ret, List) or isinstance(ret, Tuple) else print(ret)


if __name__ == '__main__':
    _start()