#include <bits/stdc++.h>
using namespace std;
#define int long long
#define rep(i,n) for(int i=0; i<(int)n; i++)
#define rep1(i,n) for(int i=1; i<(int)n; i++)
#define repa(i,a,n) for(int i=(a); i<(int)(n); i++)
#define all(vec) vec.begin(),vec.end()
#define COUT(x) cout<<(x)<<endl
#define YES(x) cout<<(x?"YES":"NO")<<endl
#define Yes(x) cout<<(x?"Yes":"No")<<endl
#define F first
#define S second
using vi = vector<int>;
using vs = vector<string>;
using vvi = vector<vi>;
using pii = pair<int, int>;
using vpii = vector<pii>;
const int dx[4] = {1, 0,-1, 0};
const int dy[4] = {0, 1, 0,-1};
int gcd(int a, int b){if(a%b == 0){return(b);}else{return(gcd(b, a%b));}}
int lcm(int a, int b){return a/gcd(a, b)*b;}
template <typename T> bool chmax(T &a,const T& b){if(a<b){a=b;return true;}return false;}
template <typename T> bool chmin(T &a,const T& b){if(a>b){a=b;return true;}return false;}
//cout << fixed << setprecision(15);
int N, M, K, H, W, X, Y;
string S,T;
const int INF = 1e18;
// const int mod = 1e9+7;

vvi gr;
vector<bool> seen;
void dfs(int a){
    seen[a] = true;
    for(int i : gr[a]){
        if(seen[i]==false) dfs(i);
    }
    return;
}


signed main(){
    cin >> N;
    vi brg(N,0);
    gr.resize(N);
    rep(i,N-1){
        int a, b; cin >> a >> b;
        brg[a]++;
        brg[b]++;
        gr[a].push_back(b);
        gr[b].push_back(a);
    }

    seen.assign(N,false);
    int cnt = 0;
    rep(i,N){
        if(seen[i]==false) {dfs(i); cnt++;}
    }


    int cnt1 = 0;
    rep(i,N){
        if(brg[i]==1) cnt1++;
    }


    if(cnt == 1) COUT("Bob");
    else if(cnt > 2) COUT("Alice");
    else if(cnt1 == 0) COUT("Bob");
    else COUT("Alice");
    return 0;
}