#include <bits/stdc++.h>

using namespace std;

vector <int> adj[100005];
int n,a,b;
bool visited[100005];
int cnt = 0;

int main(void)
{
	cin.tie(0);
	ios::sync_with_stdio(false);

	cin >> n;

	for(int i=0;i<n-1;i++)
	{
		cin >> a >> b;
		adj[a].push_back(b);
		adj[b].push_back(a);
	}

	memset(visited,false,sizeof(visited));

	vector <int> vec;
	for(int i=0;i<n;i++)
	{
		int MIN = 1e9;
		if(visited[i]==false)
		{
			queue <int> que;
			cnt++;
			que.push(i);
			visited[i] = true;
			cout << i << '\n';
			while(!que.empty())
			{
				int now = que.front();
				que.pop();
				MIN = min(MIN,(int)(adj[now].size()));
				for(auto next : adj[now])
				{
					if(visited[next]==false)
					{
						visited[next] = true;
						que.push(next);
					}
				}
			}
		}
		if(MIN==1)
		{
			vec.push_back(MIN);
		}
	}

	if(cnt==1) cout << "Bob" << '\n';
	else if(cnt==2)
	{
		if(vec.size()==0) cout << "Bob" << '\n';
		else cout << "Alice" << '\n';
	}
	else
	{
		cout << "Alice" << '\n';
	}

	return 0;
}