n,m=map(int,input().split())
e=[[] for i in range(n)]
re=[[] for i in range(n)]
d=[0]*n
for i in range(m):
  u,v=map(int,input().split())
  u-=1
  v-=1
  e[u]+=[v]
  re[v]+=[u]
  d[u]+=1
v=[-1]*n
q=[]
for i in range(n):
  if d[i]==0:
    v[i]=0
    q+=[i]
for s in q:
  if v[s]==-1:
    v[s]=any(v[t]==0 for t in e[s])
  if v[s]==0:
    for t in re[s]:
      if v[t]==-1:
        v[t]=1
        q+=[t]
  if v[s]==1:
    for t in re[s]:
      d[t]-=1
      if d[t]==0 and v[t]==-1:
        q+=[t]
print(["Bob","Alice","Draw"][v[0]])