#include <bits/stdc++.h>
using namespace std;
using lint     = long long;
const lint inf = 1LL << 60;
const lint mod = 1000000007;

struct UnionFind {
    vector<int> rank, parent, size;

    // +1 for 1-indexed nodes
    UnionFind(int n) : rank(n + 1, 0), parent(n + 1), size(n + 1, 1) {
        iota(parent.begin(), parent.end(), 0); // parent is itself
    }
    int root(int x) {
        if (x != parent[x]) {
            parent[x] = root(parent[x]);
        }
        return parent[x];
    }
    bool isSame(int x, int y) { return root(x) == root(y); }
    bool unite(int x, int y) { return link(root(x), root(y)); }
    bool link(int x, int y) {
        if (x == y)
            return false;
        if (rank[x] > rank[y]) {
            parent[y] = x;
            size[x] += size[y];
        } else {
            parent[x] = y;
            size[y] += size[x];
            if (rank[x] == rank[y]) {
                rank[y]++;
            }
        }
        return true;
    }
    int getSize(int x) { return size[root(x)]; }
};

int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    lint n;
    cin >> n;
    UnionFind uf(n);
    vector<lint> deg(n, 0);
    for (int i = 0; i < n - 1; ++i) {
        int u, v;
        cin >> u >> v;
        uf.unite(u, v);
        deg[u]++;
        deg[v]++;
    }
    if (uf.getSize(0) == n) {
        cout << "Bob"
             << "\n";
    } else {
        bool ok = true;
        int idp = 0;
        for (int i = 0; i < n; ++i) {
            if (deg[i] == 0)
                idp++;
            else if (deg[i] != 2)
                ok = false;
        }
        if (ok && idp == 1) {
            cout << "Bob"
                 << "\n";
        } else {
            cout << "Alice"
                 << "\n";
        }
    }
    return 0;
}