int gr[501];

int dfs(int u, int p, vector<vector<int>>& G){
    for(auto ch : G[u]){
        if(ch != p) gr[u] ^= dfs(ch,u,G);
    }
    return u == 1 ? gr[u] : ++gr[u];
}


string deforestation(int n, vector<vector<int>> tree) {
    memset(gr, 0, sizeof(gr));
    vector<vector<int>> G(n+1);
    for(auto p : tree){
        G[p[0]].push_back(p[1]);
        G[p[1]].push_back(p[0]);
    }
    return dfs(1,-1,G) ? "Alice" : "Bob";
}