#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, s, t) for (int i = (int)(s); i < (int)(t); ++i)
#define revrep(i, t, s) for (int i = (int)(t)-1; i >= (int)(s); --i)
#define all(x) begin(x), end(x)
template <typename T>
bool chmax(T& a, const T& b) {
    return a < b ? (a = b, 1) : 0;
}
template <typename T>
bool chmin(T& a, const T& b) {
    return a > b ? (a = b, 1) : 0;
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout << fixed << setprecision(15);

    int n;
    cin >> n;
    vector<int> deg(n);
    rep(_, 0, n - 1) {
        int u, v;
        cin >> u >> v;
        --u, --v;
        ++deg[u], ++deg[v];
    }
    int cnt = 0;
    rep(i, 0, n) if (deg[i] > 1)++ cnt;
    cout << (cnt % 2 == 0 ? "Alice" : "Bob") << endl;
}