#include<bits/stdc++.h>
#define int long long
#define endl '\n'
using namespace std;
void solve()
{
    int n;
    cin>>n;
    if(n==2) {cout<<"Bob\n";return;}
    vector<int> deg(n+1);
    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 num=0;
    function<void(int,int)> dfs=[&](int u,int fa)
    {
        int flag=0;
        for(auto v:e[u])
        {
            if(v==fa) continue;
            flag=1;
            dfs(v,u);
        }
        if(flag && fa!=1 && u!=1) num++;
    };
    dfs(1,0);
    // cout<<num<<endl;
    if(num%2) cout<<"Alice\n";
    else cout<<"Bob\n";
}
signed main()
{
    cin.tie(0)->sync_with_stdio(0);
    int t=1;
    while(t--) solve();
    return 0;
}