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

using LL = long long;
using ll = long long;
int num[55];
void solve() {
    int n;
    cin >> n;
    for(int i=1;i<n;i++)
    {
        int u,v;
        cin>>u>>v;
        num[u]++;
        num[v]++;
    }
    int cnt=0;
    for(int i=1;i<=n;i++)
        if(num[i]==1)cnt++;
    if(cnt%2==0)cout<<"Alice"<<endl;
    else cout<<"Bob"<<endl;
}

signed main() {
    ios::sync_with_stdio(0);
    cin.tie(0);

#ifdef Debug
    assert(freopen("in.txt", "r", stdin));
    assert(freopen("out.txt", "w", stdout));
#endif

    int t = 1;
    //cin >> t;
    while (t--) {
        solve();
    }
}