#define _USE_MATH_DEFINES
#include <cstdio>
#include <iostream>
#include <sstream>
#include <fstream>
#include <iomanip>
#include <algorithm>
#include <cmath>
#include <complex>
#include <string>
#include <vector>
#include <list>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <bitset>
#include <numeric>
#include <limits>
#include <climits>
#include <cfloat>
#include <functional>
#include <iterator>
using namespace std;

int main()
{
    int n;
    cin >> n;

    bool ret = false;
    vector<vector<bool> > v(2, vector<bool>(2, false));
    for(int i=0; i<n; ++i){
        int x, y;
        cin >> x >> y;
        x %= 2;
        y %= 2;
        if(v[x][y])
            ret = !ret;
        v[x][y] = !v[x][y];
    }

    if(ret)
        cout << "Alice" << endl;
    else
        cout << "Bob" << endl;

    return 0;
}