#include <iostream>
#include <bits/stdc++.h>

using namespace std;

vector <vector <int> > graph;
vector <int> parent;
vector <int> rep;
vector <int> cnt;
vector <bool> visited;
map <pair <int, int>, bool> res;
vector <bool> dfs_res;

// template <typename T>
// void printv(vector <T> & v) {
// 	for(auto u : v) {
// 		cout << u << " ";
// 	}

// 	cout << endl;
// }

bool dfs(int root) {
	visited[root] = true;
	bool found = false;
	for(auto u : graph[root]) {
		if(visited[u]) continue;
		found = true;
		parent[u] = root;
		bool r = dfs(u);
		res[make_pair(root, u)] = r;
		if(r) {
			cnt[root]++;
			rep[root] = u;
		}
	}

	if(!found) dfs_res[root] = 1;
	if(!found) return 1;
	dfs_res[root] = !cnt[root];
	return (!cnt[root]);
}

void dfs2(int root) {
	visited[root] = true;

	if(parent[root] != -1 && res[make_pair(root, parent[root])]) {
		// if(res[make_pair(root, parent[root])]) cout << root << endl;
		cnt[root]++;
		rep[root] = parent[root];
	}

	bool rs = (!cnt[root]);
	// if(graph[root].size() == 1) rs = 0;
	for(auto u : graph[root]) {
		if(!visited[u]) res[make_pair(u, root)] = rs;	
		// cout << "u=" << u << " root=" << root << " rs=" << rs << endl;
	}

	// cout << "root=" << root << " rs=" << rs << " rep=" << rep[root] << endl;

	if(cnt[root] == 1) res[make_pair(rep[root], root)] = 1;
	res[make_pair(root, -1)] = !cnt[root];

	for(auto u : graph[root]) {
		if(!visited[u]) dfs2(u);
	}
}

int main() {
	int n;
	cin >> n;
	graph.resize(n);
	parent.resize(n, -1);
	rep.resize(n, -1);
	cnt.resize(n);
	int u, v;
	for(int i = 0; i < n - 1; i++) {
		cin >> u >> v;
		graph[u - 1].push_back(v - 1);
		graph[v - 1].push_back(u - 1);
	}

	dfs_res.resize(n);
	visited.resize(n);
	dfs(0);
	visited.clear();

	// printv<int>(cnt);
	// for(auto u : res) {
	// 	cout << u.first.first << " " << u.first.second << " " << u.second << endl;
	// }
	// printv(dfs_res);
	// cout << "rep ";
	// printv(rep);

	visited.resize(n);
	dfs2(0);

	// for(auto u : res) {
	// 	cout << u.first.first << " " << u.first.second << " " << u.second << endl;
	// }
	// printv(cnt);
	// for(int i = 0; i < n; i++) {
	// 	cout << "i=" << i << " " << res[make_pair(i, -1)] << endl;
	// }

	bool can = true;
	for(int i = 0; i < n; i++) {
		if(res[make_pair(i, -1)]) {
			can = false;
			break;
		}
	}

	// cout << "rep ";
	// printv(rep);

	cout << (can ? "Bob" : "Alice") << endl;
	return 0;
}