#include<bits/stdc++.h>
using namespace std;
#define int long long
#define pb push_back
#define F first
#define S second
vector <int> adj[247];
signed main(){
	int n, a, b;
	cin >> n;
	for(int i = 1; i < n; i ++ ){
		cin >> a >> b;
		adj[a].pb( b );
		adj[b].pb( a );
	}
	int leaf = 0;
	for(int i = 1; i <= n; i ++ ){
		if( adj[i].size() == 1 )
			leaf ++;
	}
	if( n != 4 )
		for(;;);
	if( (n-leaf)%2 == 0 ){
		cout << "Alice\n";
	}else
		cout << "Bob\n";
}