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

#define ll long long 
#define lll __int128
#define INF 0x3f3f3f3f
#define LNF 0x3f3f3f3f3f3f3f3fll
#define MOD 998244353
#define pii pair<int, int>
#define ld long double
#define fi first
#define se second
#define all(a) a.begin(), a.end()

#define N 110

int deg[N];

int main() {
#ifdef TEST
    freopen("zz.in", "r+", stdin);
#endif
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    int n; cin >> n;
    for (int i = 1; i < n; ++ i) {
        int u, v; cin >> u >> v;
        deg[u] ++, deg[v] ++;
    }

    int k = -1;
    for (int i = 1; i <= n; ++ i) k += deg[i] != 1;
    
    cout << (k%2?"Alice":"Bob") << '\n';
}   

// 3 3
// 2 2