#include <bits/stdc++.h>
using namespace std;
#define PII pair<long long ,long long>
#define int long long
const int N = 2e6 + 10,MOD=1004535809,B=13331,inf=1e18,mod=998244353;
int dx[]={1,-1,0,0};
int dy[]={0,0,-1,1};
inline int read()
{
    int x=0,f=1;
    char ch=getchar();
    while(ch<'0'||ch>'9')
    {
        if(ch=='-') f=-1;
        ch=getchar();
    }
    while(ch>='0' && ch<='9')  x=x*10+ch-'0',ch=getchar();
    return x*f;
}
inline void write( int x ) {
    if ( x < 0 ) putchar ('-'), x = -x;
    if ( x > 9 ) write ( x / 10 ); putchar ( x % 10 | 48 );
}
int n,m,d[N];
vector<int>e[N];
vector<PII>a;
void lei()
{
    n=read();
    for(int i=1;i<n;i++)
    {
        int u=read(),v=read();
        e[u].push_back(v);
        e[v].push_back(u);
        a.push_back({u,v});
        d[u]++,d[v]++;
    }
    int ans=0;
    while(1)
    {
        int f=0;
        for(auto [u,v]:a)
        {
            if(d[u]==1||d[v]==1) continue;
            else
            {
                d[u]+=(d[v]-1);
                d[v]=1;
                f=1;
                ans^=1;
            }
        }
        if(!f) break;
    }
    if(ans) cout<<"Alice";
    else cout<<"Bob";
}
signed main()
{
//    std::ios::sync_with_stdio(false);
//    std::cin.tie(0);
//    std::cout.tie(0);

 
    int Tao=1;
    // Tao=read();
    while(Tao--)     lei();
    return 0;
}