#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <map>
#include <vector>
#include <algorithm>
#include <iostream>

using namespace std;
#define PRINT(x) { std::cout << #x << ": " << x << std::endl; }
//#define PRINT(x)

int main(int argc, char *argv[])
{
    int n;
    scanf("%d", &n);
    int oo = 0, eo = 0, oe = 0, ee = 0;
    for (int i = 0; i < n; ++i)
    {
        int x, y;
        scanf("%d %d", &x, &y);
        if (x % 2 == 0) {
            if (y % 2 == 0) ++oo;
            else            ++oe;
        } else {
            if (y % 2 == 0) ++eo;
            else            ++ee;
        }
    }
    int pairs = oo / 2 + eo / 2 + oe / 2 + ee / 2;
    if (pairs % 2 == 0)
    {
        puts("Bob");
    }
    else
    {
        puts("Alice");
    }
    return 0;
}