#include <bits/stdc++.h>
#define rep(i, n) for(int(i) = 0; (i) < (n); (i)++)
#define FOR(i, m, n) for(int(i) = (m); (i) < (n); (i)++)
#define ALL(v) (v).begin(), (v).end()
#define LLA(v) (v).rbegin(), (v).rend()
#define PB push_back
#define MP(a, b) make_pair((a), (b))
using namespace std;
template <class T> inline vector<T> make_vec(size_t a, T val) {
    return vector<T>(a, val);
}
template <class... Ts> inline auto make_vec(size_t a, Ts... ts) {
    return vector<decltype(make_vec(ts...))>(a, make_vec(ts...));
}
template <typename T> inline T read() {
    T t;
    cin >> t;
    return t;
}
template <typename T> inline vector<T> readv(size_t sz) {
    vector<T> ret(sz);
    rep(i, sz) cin >> ret[i];
    return ret;
}
template <typename... Ts> inline tuple<Ts...> reads() {
    return {read<Ts>()...};
}
template <typename T> struct edge {
    int to;
    T cost;
    edge(int t, T c) : to(t), cost(c) {}
};
using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
using Graph = vector<vector<int>>;
template <typename T> using WGraph = vector<vector<edge<T>>>;
const int INF = 1 << 30;
const ll LINF = 1LL << 60;
const int MOD = 1e9 + 7;

// UnionFind
struct UnionFind {
    vector<ll> par;
    vector<ll> siz;

    UnionFind(ll N) : par(N), siz(N, 1LL) {
        for(int i = 0; i < N; i++)
            par[i] = i;
    }
    int root(int x) {
        if(par[x] == x)
            return x;
        return par[x] = root(par[x]);
    }
    void unite(int x, int y) {
        int rx = root(x);
        int ry = root(y);
        if(rx == ry)
            return;
        if(siz[rx] < siz[ry])
            swap(rx, ry);
        siz[rx] += siz[ry];
        par[ry] = rx;
    }
    bool same(int x, int y) {
        int rx = root(x);
        int ry = root(y);
        return rx == ry;
    }
    ll size(ll x) { return siz[root(x)]; }
};

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int N = read<int>();
    UnionFind uf(N);
    Graph G(N);
    rep(i, N - 1) {
        auto [u, v] = reads<int, int>();
        G[u].PB(v);
        G[v].PB(u);
        uf.unite(u, v);
    }
    set<int> se;
    rep(i, N) se.insert(uf.root(i));
    if(se.size() == 1) {
        cout << "Bob" << endl;
    } else if(se.size() == 2) {
        rep(i, N) {
            if(G[i].size() == 1) {
                cout << "Alice" << endl;
                return 0;
            }
        }
        cout << "Bob" << endl;
    } else {
        cout << "Alice" << endl;
    }
}