#include <bits/stdc++.h>
using namespace std;
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) begin(v),end(v)
template<typename A, typename B> inline bool chmax(A & a, const B & b) { if (a < b) { a = b; return true; } return false; }
template<typename A, typename B> inline bool chmin(A & a, const B & b) { if (a > b) { a = b; return true; } return false; }
using ll = long long;
using pii = pair<int, int>;
constexpr ll INF = 1ll<<30;
constexpr ll longINF = 1ll<<60;
constexpr ll MOD = 1000000007;
constexpr bool debug = false;
//---------------------------------//

int main() {
	int N;
	cin >> N;
	vector<int> cnt(N);
	REP(i, N - 1) {
		int u, v;
		scanf("%d %d", &u, &v);
		++cnt[u]; ++cnt[v];
	}
	
	int two = 0, zero = 0;
	REP(i, N) {
		if (cnt[i] == 2) ++two;
		else if (cnt[i] == 0) ++zero;
	}
	if (two == N - 1 || zero == 0) puts("Bob");
	else puts("Alice");
}