#include <iostream>
#include <iomanip>
#include <vector>
#include <utility>
#include <map>
#include <algorithm>
#include <queue>
#include <cmath>
#include <numeric>
#include <set>

using namespace std;
struct aaa{aaa(){cin.tie(nullptr); ios::sync_with_stdio(false); cout<<fixed<<setprecision(20);};}aaa;
template <class T>ostream &operator<<(ostream &o,const vector<T>&v){o<<"{";for(int i=0;i<(int)v.size();i++)o<<(i>0?", ":"")<<v[i];o<<"}";return o;}
#define debug(v) {cerr<<"\033[1;36m[debug]\033[m "<<#v<<" : "<<v<<endl;}

using int64 = long long;

void dfs(int64 u, vector<vector<int64>>& g, vector<bool>& visited) {
    if (visited[u]) return;
    visited[u] = true;
    for(const auto& v : g[u]) {
        dfs(v, g, visited);
    }
}

int main() {
    int64 n;
    cin >> n;
    vector<vector<int64>> g(n);

    if (n == 2) {
        cout << "Bob" << endl;
        return 0;
    }

    for (int i = 0; i < n - 1; i++) {
        int64 u, v;
        cin >> u >> v;
        g[u].push_back(v);
        g[v].push_back(u);
    }

    vector<bool> visited(n,false);
    dfs(0, g, visited);
    bool ans = all_of(visited.begin(), visited.end(), [](bool x){return x;});

    cout << (ans? "Bob" : "Alice") << endl;
}