#include<bits/stdc++.h>
#define poly vector<int>
#define IOS ios::sync_with_stdio(false)
#define ll long long
#define mp make_pair
#define mt make_tuple
#define pa pair < int,int >
#define fi first
#define se second
#define inf 1e18
#define mod 998244353
#define sz(x) ((int)((x).size()))
// #define int ll
// #define N 
using namespace std;
int du[55];
void BellaKira()
{
    int n;
    cin>>n;
    for (int i=1;i<n;i++)
    {
        int x,y;
        cin>>x>>y;
        du[x]++,du[y]++;
    }
    int tot=0;
    for (int i=1;i<=n;i++) tot+=(du[i]==1);
    if ((n-1)%2==tot%2) cout<<"Bob\n";
    else cout<<"Alice\n";
}
signed main()
{
    IOS;
    cin.tie(0);
    int T=1;
    while (T--)
    {
        BellaKira();
    }
}
/*list:
1.mod 998244353 or 1e9+7 or ???
2.N
3.duipai shuju xingtai duoyidian
...
*/