#include <bits/stdc++.h>

using namespace std;

#define FOR(i, a, b) for(int i = (a); i < (b); i++)
#define RFOR(i, a, b) for(int i = (a) - 1; i >= (b); i--)
#define SZ(a) int(a.size())
#define ALL(a) a.begin(), a.end()
#define PB push_back
#define MP make_pair
#define F first
#define S second

typedef long long LL;
typedef vector<int> VI;
typedef pair<int, int> PII;
typedef double db;

const int N = 100'447;
VI g[N];

int dfs(int v, int p = -1)
{
	int pd = 0;
	for (auto to : g[v])
	{
		if (to != p)
		{
			int x = dfs(to, v);
			pd += x;
		}
	}
	if (pd == 0)
		return 1;
	return pd - 1;
}

int main()
{
	ios::sync_with_stdio(0);
	cin.tie(0);
	
	int n;
	cin >> n;
	FOR (i, 0, n - 1)
	{
		int u, v;
		cin >> u >> v;
		u--, v--;
		g[u].PB(v);
		g[v].PB(u);
	}
	cout << (dfs(0) ? "Alice\n" : "Bob\n");
	
	
	return 0;
}