#include<bits/stdc++.h>
using namespace std;
#define int long long 
#define endl '\n'
const int N = 1e6 + 10,M=210;
const int inf=0x3f3f3f3f,mod=998244353;

void solve()
{
    int n;cin>>n;
    vector<int>e[n+1];
    for(int i=1;i<n;i++)
    {
        int u,v;cin>>u>>v;
        e[u].push_back(v);
        e[v].push_back(u);
    }
    int fg=0;
    for(int i=1;i<=n;i++)
    {
        if(e[i].size()==n-1)fg=1;
        else if(e[i].size()==n-2)fg=-1;
    }
    if(fg==1)cout<<"Bob"<<endl;
    else if(fg==-1)cout<<"Alice"<<endl;
    else cout<<"Draw"<<endl;
}
signed main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int T=1;
    // cin>>T;
    while(T--)
    {
        solve();
    }
    return 0;
}