#include "bits/stdc++.h"
using namespace std;
#define int long long
#define REP(i,n) for(int i = 0;i < (int)(n);i++)
#define RREP(i,n) for(int i = (int)n-1;i >= 0;i--)
#define FOR(i,s,n) for(int i = s;i < (int)n;i++)
#define RFOR(i,s,n) for(int i = (int)n-1;i >= s;i--)
#define ALL(a) a.begin(),a.end()
#define IN(a, x, b) (a<=x && x<b)
template<class T>inline bool CHMAX(T&a,T b){if(a<b){a = b;return true;}return false;}
template<class T>inline bool CHMIN(T&a,T b){if(a>b){a = b;return true;}return false;}
constexpr long long INF = 1e9;



signed main(){
	int N;
	cin >> N;
	vector<vector<int>>g(N);
	vector<int>cnt(N);
	REP(i,N-1){
		int a,b;
		cin >> a >> b;
		g[a].emplace_back(b);
		g[b].emplace_back(a);
		cnt[a]++;
		cnt[b]++;
	}
	int zero = 0;
	int zeroid = -1;
	REP(i,N){
		if(cnt[i] == 0){
			zero++;
			zeroid = i;
		}
	}
	if(zero == 0){
		cout << "Bob" << endl;
		return 0;
	}
	if(zero >= 2){
		cout << "Alice" << endl;
		return 0;
	}
	int flg = 1;
	REP(i,N){
		if(i != zeroid && cnt[i] != 2){
			cout << "Alice" << endl;
			return 0;
		}
	}
	vector<int>visit(N,0);
	auto dfs = [&](auto&&f,int now,int par)->int{
		visit[now] = true;
		int ret = 1;
		for(auto e:g[now]){
			if(e == par || visit[e])continue;
			ret += f(f,e,now);
		}
		return ret;
	};
	int sum;
	if(zeroid == 0)sum = dfs(dfs,1,-1);
	else sum = dfs(dfs,0,-1);
	if(sum == N - 1){
		cout << "Bob" << endl;
	}else{
		cout << "Alice" << endl;
	}
}