#include <bits/stdc++.h>
using namespace std;

void dfs(const vector<vector<int>> &to, vector<bool> &isvisited, int index) {
    isvisited.at(index) = true;
    for (int next : to.at(index)) {
        if (isvisited.at(next)) return;
    }
}

int main() {
    int n;
    cin >> n;
    vector<vector<int>> to(n);
    for (int i = 0; i < n - 1; i++) {
        int u, v;
        cin >> u >> v;
        to.at(u).push_back(v);
        to.at(v).push_back(u);
    }
    vector<bool> isvisited(n);
    int connected = 0;
    for (int i = 0; i < n; i++) {
        if (isvisited.at(i)) continue;
        connected++;
        dfs(to, isvisited, i);
    }
    if (connected == 1) {
        cout << "Bob" << endl;
    } else if (connected >= 3) {
        cout << "Alice" << endl;
    } else {
        for (int i = 0; i < n; i++) {
            if (to.at(i).size() == 1) {
                cout << "Alice" << endl;
                return 0;
            }
        }
        cout << "Bob" << endl;
    }
}