#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, s, e) for (int i = (int)s; i < (int)e; ++i)
#define all(a) (a).begin(), (a).end()

int main() {
    cin.tie(nullptr);
    std::ios_base::sync_with_stdio(false);
    
    int N;
    cin >> N;
    
    vector<int> cnt(4, 0);
    rep(i, 0, N) {
        int x, y;
        cin >> x >> y;
        
        x %= 2, y %= 2;
        
        if (x == 0 && y == 0) cnt[0]++;
        else if (x == 1 && y == 0) cnt[1]++;
        else if (x == 0 && y == 1) cnt[2]++;
        else cnt[3]++;
    }
    
    int sum = 0;
    rep(i, 0, 4) sum += cnt[i] / 2;
    
    if (sum % 2 == 0) cout << "Bob\n";
    else cout << "Alice\n";
}