#include <iostream>
#include <math.h>
#include <string>
#include <algorithm>
#include <vector>
#include <iomanip>
#define REP(i,n) for(int i=0;i<n;i++)
typedef long long ll;

using namespace std;
int kaijo(int n){
	int ans = 1;
	if (n != 0){
		for (int i = 0; i < n; i++){
			ans *= (n - i);
		}
	}
	else{
		ans = 1;
	}
	return ans;
}

int main(){
	int n;
	int x, y;
	int cnt = 0;
	int cnt1 = 0;
	int cnt2 = 0;
	int cnt3 = 0;
	int cnt4 = 0;
	cin >> n;
	REP(i, n){
		cin >> x >> y;
		if (x == (x / 2) * 2){
			if (y == (y / 2) * 2){
				cnt1++;
				if (cnt1 == 2){
					cnt++;
					cnt1 = 0;
				}
			}
			else{
				cnt2++;
				if (cnt2 == 2){
					cnt++;
					cnt2 = 0;
				}
			}
		}
		else{
			if (y == (y / 2) * 2){
				cnt3++;
				if (cnt3 == 2){
					cnt++;
					cnt3 = 0;
				}
			}
			else{
				cnt4++;
				if (cnt4 == 2){
					cnt++;
					cnt4 = 0;
				}
			}
		}
	}
	if (cnt == (cnt / 2) * 2){
		cout << "Bob" << endl;
	}
	else{
		cout << "Alice" << endl;
	}
	return 0;
}