#pragma GCC target("avx")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include<iostream>
#include<set>
#include<map>
using namespace std;
using i32 = int_fast32_t;
using i64 = int_fast64_t;
#define rep(i, n) for (i32 i = 0; i < (i32)(n); i++)
#define all(a) (a).begin(),(a).end()
#define rall(a) (a).rbegin(),(a).rend()
using P = pair<i64,i64>;

int main(){
ios::sync_with_stdio(false);
std::cin.tie(nullptr);
i32 n;
cin >> n;
map<i32,i32> mp;
rep(i,n - 1){
    i32 u,v;
    cin >> u >> v;
   mp[u]++;
   mp[v]++;
}
i32 cnt_2 = 0;
bool flag = 1;
rep(i,n) {
    if (mp[i] == 0)
        flag = 0;
    if (mp[i] >= 2)
        cnt_2++;
}
cout << (flag && cnt_2 ? "Bob" : "Alice" ) << endl;
}