//#include <bits/stdc++.h>
#include<iostream>
#include<vector>
#define REP(i, x, y) for (ll i = x; i <= y; i++)
#define BIT(t) (1ll << t)
#define PER(i, y, x) for (ll i = y; i >= x; i--)
#define vll vector<ll>
#define vvll vector<vector<ll>>
#define pll pair<ll, ll>
#define SIZE(v) ll(v.size())
#define UNIQUE(v) v.erase(unique(v.begin(), v.end()), v.end());
using namespace std;
typedef long long ll;
//        ios::sync_with_stdio(false);
//        cin.tie(nullptr);

void dfs(ll n,ll cur, vll& color, vvll& g){
        if(color[cur] == 1){
                return;
        }else{
                color[cur] = 1;
                for(auto x: g[cur]){
                        if(color[x] == 0){
                                dfs(n, x, color, g);
                        }
                }
        }
}

int main(){
        ll n;
        cin >> n;
        vvll g(n);
        REP(i,1,n-1){
                ll u,v;
                cin >> u >> v;
                g[u].push_back(v);
                g[v].push_back(u);
        }
        vll color(n,0);
        ll conn = 0;
        REP(i,0,n-1){
                if(color[i] == 0){
                        dfs(n,i,color, g);
                        conn++;
                }
        }
        if(conn == 1){
                cout << "Bob" << endl;
                return 0;
        }else if(conn == 2){
                REP(i,0,n-1){
                        if(g[i].size()==1 || g[i].size() > 2){
                                cout << "Alice" << endl;
                                return 0;
                        }
                }
                cout << "Bob" << endl;
        }else{
                cout << "Alice" << endl;
        }

}