#include<bits/stdc++.h>
using namespace std;
const int N =60;
int n,m;
vector<int> g[N]; 
void solve() {
	cin >> n;
	for (int i = 1; i < n; i++) {
		int u,v;
		cin >> u >> v;
		g[u].push_back(v);
		g[v].push_back(u);
		
	}
	int ans = 0;
	for (int i = 1; i <= n; i++) {
		int x = g[i].size();
		ans += (x == 1) ? 1 : 0;
	}
	ans = n - ans;
	cout << ((ans % 2) ? "Bob" : "Alice") << endl;
}
signed main(){
	ios::sync_with_stdio(false),cin.tie(0),cout.tie(0);
	int T = 1;
	while (T--) {
		solve();
	} 
	return 0;
}