#include<bits/stdc++.h>
#define EM 1000000
using namespace std;
using LL = long long;
using P = pair<LL, LL>;
LL LINF = 1e18;
int INF = 1e9;
LL mod = 1e9+7;
using vint = vector<int>;
using vLL = vector<LL>;
using vvint = vector<vector<int>>;
using vvLL = vector<vector<LL>>;
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }

int main(){
    int N;
    cin >> N;
    vector<int> u(N-1), v(N-1);
    for(int i = 0;i < N-1;i++)  cin >> u[i] >> v[i];
    vector<int> cnt(N, 0);
    for(int i = 0;i < N-1;i++){
        cnt[u[i]]++;
        cnt[v[i]]++;
    }
    int iso = N;
    int cnt1 = 0;
    for(int i = 0;i < N;i++){
        iso -= min(1, cnt[i]);
        if(cnt[i] == 1) cnt1++;
    }
    if(iso >= 2)    cout << "Alice" << endl;
    else if(iso == 1){
        if(cnt1 > 0)    cout << "Alice" << endl;
        else    cout << "Bob" << endl;
    }else   cout << "Bob" << endl;
}