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

#define fi first
#define se second
#define pb push_back
#define Mp make_pair
#define SZ(x) (int((x).size()))

typedef long long ll;
typedef double db;
typedef vector<int> vi;
typedef pair<int, int> pii;

void solve() {
    int n;
    cin >> n;
    vi d(n + 1);
    for(int i = 1; i < n; i++) {
        int u, v;
        cin >> u >> v;
        d[u]++, d[v]++;
    }
    int cnt = n - 1;
    for(int i = 1; i <= n; i++) if(d[i] == 1) cnt--;
    cout << (cnt % 2 ? "Alice" : "Bob") << '\n';
}
signed main() {
    ios::sync_with_stdio(false), cin.tie(0), cout.tie(0);
    int t = 1;
    // cin >> t;
    while(t--) solve();
    return 0;
}