#include <bits/stdc++.h>
using namespace std;
#define int long long
#define pll pair<int,int>
#define fi first
#define se second
typedef long long LL;
typedef unsigned long long ull;
int n, m, k;
const int N = 1e5 + 10, M = 1e5, mod = 998244353;
int num[N], book[N];
int  res, cnt;


void solve() {
	cin>>n;
	for(int i=1;i<n;i++)
	{
		int a,b;
		cin>>a>>b;
		num[a]++,num[b]++;
		if(num[a]==2) res++;
		if(num[b]==2) res++;
	}
	if(res&1) cout<<"Bob\n";
	else cout<<"Alice\n";
}


signed main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	cout.tie(nullptr);
	int T = 1;
	//cin >> T;
	while (T--) {
		solve();
	}
	return 0;
}
/*

*/