#include<bits/stdc++.h>
#define endl '\n';
#define rep(i,n) for(int i=0; i<(n); i++)
using namespace std;
using ll = long long;
using P = pair<int,int>;
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#pragma GCC optimize("Ofast")
constexpr ll INF = 1e18;
constexpr int inf = 1e9;
constexpr double INFD = 1e100;
constexpr ll mod = 1000000007;
constexpr ll mod2 = 998244353;
const double PI = 3.1415926535897932384626433832795028841971;
const int dx[4] = {1, 0, -1, 0};
const int dy[4] = {0, 1, 0, -1};
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }
// ios::sync_with_stdio(false);
// cin.tie(nullptr);
// ---------------------------------------------------------------------------

int main(){
  int N;
  cin >> N;
  vector<int> cnt(N,0);
  rep(i,N-1){
    int a,b;
    cin >> a >> b;
    cnt[a]++;
    cnt[b]++;
  }
  int sum = 0;
  rep(i,N){
    if(cnt[i] == 0) sum++;
  }
  if(sum == 0){
    cout << "Bob" << endl;
  }else if(sum == 1){
    rep(i,N){
      if(cnt[i] == 1){
        cout << "Alice" << endl;
        return 0;
      }
    }
    cout << "Bob" << endl;
  }else{
    cout << "Alice" << endl;
  }
  return 0;
}