#include <cstdio>
#include <iostream>
#include <string>
#include <sstream>
#include <stack>
#include <algorithm>
#include <cmath>
#include <queue>
#include <map>
#include <set>
#include <cstdlib>
#include <bitset>
#include <tuple>
#include <assert.h>
#include <deque>
#include <bitset>
#include <iomanip>
#include <limits>
#include <chrono>
#include <random>
#include <array>
#include <unordered_map>
#include <functional>
#include <complex>

template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }

const long long MAX = 5100000;
const long long INF = 1LL << 60;
const long long mod = 1000000007LL;
//const long long mod = 998244353LL;

using namespace std;
typedef unsigned long long ull;
typedef long long ll;

class UnionFind {
public:
	vector<ll> Parent;
	UnionFind(ll N) {
		Parent = vector<ll>(N, -1);
	}
	ll root(ll A) {
		if (Parent[A] < 0) {
			return A;
		}
		return Parent[A] = root(Parent[A]);
	}

	ll size(ll A) {
		return -Parent[root(A)];
	}

	bool connect(ll A, ll B) {
		A = root(A);
		B = root(B);
		if (A == B) {
			return false;
		}
		if (size(A) < size(B)) {
			swap(A, B);
		}

		Parent[A] += Parent[B];
		Parent[B] = A;

		return true;
	}

};
int main()
{
	/*
	cin.tie(nullptr);
	ios::sync_with_stdio(false);
	*/

	ll N;  scanf("%lld", &N);
	UnionFind uni(N);
	vector<ll> deg(N);
	vector<ll> v;
	for (ll i = 0; i < N - 1; i++) {
		ll u, v; scanf("%lld %lld", &u, &v);
		uni.connect(u, v);
		deg[u]++;
		deg[v]++;
	}
	for (ll i = 0; i < N; i++) v.push_back(uni.root(i));
	sort(v.begin(), v.end()); v.erase(unique(v.begin(), v.end()), v.end());
	if (uni.size(0) == N) {
		puts("Bob");
	}
	else if (v.size() == 2) {
		bool flag = true;
		for (ll i = 0; i < N; i++) if (deg[i] == 1) flag = false;
		if (!flag) puts("Alice");
		else puts("Bob");
	}
	else {
		puts("Alice");
	}
	return 0;
}