#include <bits/stdc++.h>

using namespace std;

#define iter(v) v.begin(), v.end()
#define SZ(v) int(v.size())
#define pb emplace_back
#define ff first
#define ss second

using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

#ifdef zisk
void debug(){cerr << "\n";}
template<class T, class ... U>
void debug(T a, U ... b){cerr << a << " ", debug(b...);}
template<class T> void pary(T l, T r){
	while (l != r) cerr << *l << " ", l++;
	cerr << "\n";
}
#else
#define debug(...) void()
#define pary(...) void()
#endif

template<class A, class B>
ostream &operator<<(ostream& o, pair<A, B> p) {
	return o << '(' << p.ff << ',' << p.ss << ')';
}

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	int n;
	cin >> n;
	vector<int> deg(n);
	for(int i=1;i<n;i++){
		int a,b;
		cin >> a >> b;
		a--;
		b--;
		deg[a]++;
		deg[b]++;
	}
	int cnt=0;
	for(int i=0;i<n;i++){
		if(deg[i]==1){
			cnt++;
		}
	}
	int r=n-1;
	if((r-cnt)%2==0){
		cout << "Bob\n";
	}
	else{
		cout << "Alice\n";
	}
}