#include <bits/stdc++.h>
using namespace std;

void main_program();

signed main(){
	ios_base::sync_with_stdio(0); cin.tie(0);
	main_program();
}

void main_program(){
	int n; cin >> n;
	vector<int> v(n);

	for (int i = 0; i < n-1; i++){
		int x, y; cin >> x >> y;
		x--; y--;
		v[x]++; v[y]++;
	}

	int cnt = 0;
	for (int i = 0; i < n; i++) cnt += (v[i] == 1);

	int rem = n - cnt;
	if (rem % 2) cout << "Bob\n";
	else cout << "Alice\n";
}