/**
 * code generated by JHelper
 * More info: https://github.com/AlexeyDmitriev/JHelper
 * @author aajisaka
 */

#include<bits/stdc++.h>

using namespace std;

void debug_out() { cerr << endl; }
template <typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
  cerr << " " << to_string(H);
  debug_out(T...);
}
#ifdef LOCAL
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#else
#define debug(...) 42
#endif

#define SPEED ios_base::sync_with_stdio(false);cin.tie(nullptr)
#define rep(i,n) for(int i=0; i<(int)(n); i++)
#define all(v) v.begin(), v.end()
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return true; } return false; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return true; } return false; }

using ll = long long;
using P = pair<ll, ll>;

constexpr long double PI = 3.14159265358979323846264338327950288L;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

class ABC086AProduct {
public:

    std::vector<int> par;
    std::vector<int> rak; // number of the vertices

    void init(int n) {
      par.resize(n);
      rak.resize(n);
      for(int i=0; i<n; i++) {
        par[i] = i;
        rak[i] = 1;
      }
    }

    int find(int x) {
      if (par[x] == x) {
        return x;
      } else {
        return par[x] = find(par[x]);
      }
    }

    void unite(int x, int y) {
      x = find(x);
      y = find(y);
      if (x==y) return;
      if (rak[x] < rak[y]) {
        rak[y] += rak[x];
        par[x] = y;
      } else {
        rak[x] += rak[y];
        par[y] = x;
      }
    }

    bool same(int x, int y) {
      return find(x) == find(y);
    }

    vector<int> deg;

    void solve(istream& cin, ostream& cout) {
      SPEED;
      int n; cin >> n;
      deg.resize(n);
      init(n);
      rep(i, n-1) {
        int u, v; cin >> u >> v;
        unite(u, v);
        deg[u]++;
        deg[v]++;
      }
      int p = find(0);
      if (rak[p] == n) {
        cout << "Bob" << endl;
      } else {
        bool flag = true;
        rep(i, n) {
          if (deg[i] != 2 && deg[i] != 0) {
            flag = false;
            break;
          }
        }
        if (flag) {
          cout << "Bob" << endl;
        } else {
          cout << "Alice" << endl;
        }
      }
    }
};

signed main() {
  ABC086AProduct solver;
  std::istream& in(std::cin);
  std::ostream& out(std::cout);
  solver.solve(in, out);
  return 0;
}