#include "bits/stdc++.h"

#define rep(a,b) for(int a = 0;a < b;a++)
#define REP(i, x, n) for(int i = x; i < n; i++)
#define P(a) cout << a << endl
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
int dx[] = { 1, -1 , 0 , 0 };
int dy[] = { 0,  0,  1, -1 };
ll MOD = 1000000007;
unsigned long long str_to_int(std::string str) {
    unsigned long long ret;
    std::stringstream ss; ss << str;
    ss >> ret;
    return ret;
}

void solve(){
    int n;
    cin >> n;
    vector<int> v(4);
    rep(i,n){
        int a,b;
        cin >> a >> b;
        if(a%2 == 0 and b%2 == 0){
            v[0]++;
        }else if(a%2 == 0 and b%2 == 1){
            v[1]++;
        }else if(a%2 == 1 and b%2 == 0){
            v[2]++;
        }else{
            v[3]++;
        }
    }
    int ans = 0;
    rep(i,4){
        ans += v[i]/2;
    }
    if(ans % 2 == 0){
        P("Bob");
    }else{
        P("Alice");
    }
}

int main() {
    solve();
    return 0;
}