#include <iostream>
#include <vector>
#include <string>
#include <cstring>
#include <math.h>
#include <cmath>
#include <limits.h>
#include <map>
#include <set>
#include <queue>
#include <algorithm>
#include <functional>
#include <stdio.h>
using namespace std;

long long MOD = 1000000007;

int main() {
    
    int N;
    cin >> N;
    
    int A[2][2] = { {0,0},{0,0} };
    
    for ( int i = 0; i < N; i++ ) {
        long long x,y;
        cin >> x >> y;
        A[x%2][y%2]++;
    }
    
    int a = 0;
    for ( int i = 0; i < 2; i++ ) {
    for ( int j = 0; j < 2; j++ ) {
        a += A[i][j]/2;
    }
    }
    
    cout << ( a%2 ? "Alice" : "Bob" ) << endl;
    
    return 0;
}