#pragma GCC target("avx")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include<iostream>
#include<vector>
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>;
template <typename T>
class UnionFind
{
public:
    vector<T> par;
    UnionFind(T n) : par(n, -1) {}
    void init(T n)
    {
        for (i32 i = 0; i < n; i++)
        {
            par[i] = -1;
        }
    }

    i64 root(T x)
    {
        if (par[x] < 0)
            return x;
        else
            return par[x] = root(par[x]);
    }

    bool same(T x, T y)
    {
        return root(x) == root(y);
    }

    bool merge(T x, T y)
    {
        x = root(x);
        y = root(y);
        if (x == y)
            return false;
        if (par[x] > par[y])
            swap(x, y);
        par[x] += par[y];
        par[y] = x;
        return true;
    }

    i64 size(T x)
    {
        return -par[root(x)];
    }
};
int main(){
ios::sync_with_stdio(false);
std::cin.tie(nullptr);
i64 n;
cin >> n;
UnionFind uft(n);
rep(i,n - 1){
    i64 u,v;
    cin >> u >> v;
    uft.merge(u,v);
}
i64 cnt = 0;
rep(i,n){
    if(uft.size(i) == n) cnt++;
}
cout << (cnt == n ? "Bob" : "Alice") << endl;
}