#include <bits/stdc++.h>

using namespace std;

#define int long long
#define lep(i,a,b) for(int i = (a); i <= (b); i++)
#define rep(i,b,a) for(int i = (b); i >= (a); i--)
#define mp make_pair
#define pb push_back
#define eb emplace_back
#define f first
#define s second

void submit(string ans) {
    cout << ans << "\n";
}

signed main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    int n;
    cin >> n;
    vector<int> deg(n+1);
    lep(i,1,n-1) {
        int u,v;
        cin >> u >> v;
        deg[u]++, deg[v]++;
    }
    int numg = 0;
    lep(i,1,n) numg += (deg[i] > 1);
    if (numg&1) {
        submit("Bob");
    } else {
        submit("Alice");
    }
}