#include <iostream>
#include <algorithm>
using namespace std;

int main(){
    int N;
    cin >> N;
    int points[2][2] = {{0, 0}, {0, 0}};
    for(int i = 0; i < N; i++){
        int x, y;
        cin >> x >> y;
        points[x % 2][y % 2]++;
    }
    int can_pop = 0;
    can_pop += points[0][0] / 2;
    can_pop += points[0][1] / 2;
    can_pop += points[1][0] / 2;
    can_pop += points[1][1] / 2;
    if(can_pop % 2){
        cout << "Alice" << endl;
    }else{
        cout << "Bob" << endl;
    }
}