#pragma target("avx")
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef long double ld;
typedef pair<ll, ll> P;
typedef vector<ll> V;
typedef unordered_map<ll, ll> U_MAP;
typedef priority_queue<ll> pq;
typedef priority_queue<ll, vector<ll>, greater<ll>> rpq;
const int INF = 1e9, MOD = 1e9 + 7, ohara = 1e6 + 10;
const ll LINF = 1e18;

#define rep(i, n) for (ll(i) = 0; (i) < (int)(n); (i)++)
#define rrep(i, a, b) for (ll i = (a); i < (b); i++)
#define rrrep(i, a, b) for (ll i = (a); i >= (b); i--)
#define all(v) (v).begin(), (v).end()
#define Size(n) (n).size()
#define Cout(x) cout << (x) << endl
#define doublecout(a) cout << fixed << setprecision(15) << a << endl;
#define fi first
#define se second
#define m_p make_pair
#define p_b push_back
string to_string(string s) { return '"' + s + '"'; }
string to_string(const char* s) { return to_string((string)s); }
string to_string(bool b) { return (b ? "true" : "false"); }
template <typename A, typename B>
string to_string(pair<A, B> p) {
  return "(" + to_string(p.first) + ", " + to_string(p.second) + ")";
}
template <typename A>
string to_string(A v) {
  bool first = true;
  string res = "{";
  for (const auto& x : v) {
    if (!first) {
      res += ", ";
    }
    first = false;
    res += to_string(x);
  }
  res += "}";
  return res;
}
void debug_out() { cerr << endl; }
template <typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
  cerr << " " << to_string(H);
  debug_out(T...);
}
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)

//------ Believe yourself as a genius!!!!!! ------

struct UnionFind {
  std::vector<ll> data;

  UnionFind(ll n) { data.assign(n, -1); }

  void unite(int x, int y) {
    x = find(x);
    y = find(y);
    if (x == y) return;
    if (data[x] > data[y]) swap(x, y);
    data[x] += data[y];
    data[y] = x;
  }

  int find(int k) {
    if (data[k] < 0) return k;
    return data[k] = find(data[k]);
  }

  ll size(int k) { return -data[find(k)]; }

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

int dy[] = {1, 0, -1, 0};
int dx[] = {0, 1, 0, -1};
// int dy[]={-1,0,1,-1,1,-1,0,1};int dx[]={-1,-1,-1,0,0,1,1,1};
string alph("abcdefghijklmnopqrstuvwxyz"), s;
ll n, cnt[ohara], ans, a[ohara], b[ohara], c, d, tmp, m, h, w, x, y, sum, k, q;
V g[ohara];
U_MAP mita;
ll need, cou, group;

int main(void) {
  cin.tie(0);
  cout.tie(0);
  ios::sync_with_stdio(false);

  cin >> n;
  UnionFind uf(n + 10);
  rep(i, n - 1) {
    cin >> a[i] >> b[i];
    g[a[i]].p_b(b[i]);
    g[b[i]].p_b(a[i]);
    cnt[a[i]]++;
    cnt[b[i]]++;
    uf.unite(a[i], b[i]);
  }
  rep(i, n) {
    if (mita[uf.find(i)] == 1) continue;
    mita[uf.find(i)] = 1;
    group++;
  }
  rep(i, n) {
    if (Size(g[i]) == 1) {
      group++;
      break;
    }
  }
  if (group <= 2)
    Cout("Bob");
  else
    Cout("Alice");
  return 0;
}