#include<bits/stdc++.h>
using namespace std;
#define int long long
#define endl '\n'
#define pii pair<int, int>
void solve();

signed main()
{
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int T = 1;
    // cin >> T;
    while (T--)solve();
    return 0;
}
const int mod = 1e9 + 7;


void solve() {
    int n;
    cin>>n;
    vector<int>a(n+1);
    for(int i=1;i<n;i++) {
        int x,y;
        cin>>x>>y;
        a[x]++;
        a[y]++;
    }
    int ans=0;
    for(int i=1;i<=n;i++) {
        ans+=(a[i]>=2);
    }
    if(ans&1^1)cout<<"Alice\n";
    else cout<<"Bob\n";
}