#include "bits/stdc++.h"

using namespace std;

using ll = long long int;
using ld = long double;

using vi = vector<int>;
using vvi = vector<vi>;
using vvvi = vector<vvi>;
using vl = vector<ll>;
using vvl = vector<vl>;
using vvvl = vector<vvl>;
using vd = vector<double>;
using vvd = vector<vd>;
using vb = vector<bool>;
using vvb = vector<vb>;
using vs = vector<string>;

const int INF = (1 << 30) - 1;
const ll INF64 = ((ll)1 << 62) - 1;
const double PI = 3.1415926535897932384626433832795;

const int dx[] = { -1, 0, 1, 0 };
const int dy[] = { 0, 1, 0, -1 };

int gcd(int x, int y) { return y ? gcd(y, x % y) : x; }
ll gcd(ll x, ll y) { return y ? gcd(y, x % y) : x; }
int lcm(int x, int y) { return x / gcd(x, y) * y; }
ll lcm(ll x, ll y) { return x / gcd(x, y) * y; }

bool isEven(int num) {
	return num % 2 == 0;
}

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);

	int n;
	cin >> n;

	vi x(n), y(n);
	for (int i = 0; i < n; i++) {
		cin >> x[i] >> y[i];
	}

	ll evenEvenCnt = 0, evenOddCnt = 0, oddEvenCnt = 0, oddOddCnt = 0;
	for (int i = 0; i < n; i++) {
		if (isEven(x[i]) && isEven(y[i])) {
			evenEvenCnt++;
		} else if (isEven(x[i]) && !isEven(y[i])) {
			evenOddCnt++;
		} else if (!isEven(x[i]) && isEven(y[i])) {
			oddEvenCnt++;
		} else {
			oddOddCnt++;
		}
	}

	evenEvenCnt = evenEvenCnt == 0 ? 1 : evenEvenCnt;
	evenOddCnt = evenOddCnt == 0 ? 1 : evenOddCnt;
	oddEvenCnt = oddEvenCnt == 0 ? 1 : oddEvenCnt;
	oddOddCnt = oddOddCnt == 0 ? 1 : oddOddCnt;

	ll res = evenEvenCnt / 2 + evenOddCnt / 2 + oddEvenCnt / 2 + oddOddCnt / 2;
	cout << (res & 1 ? "Alice" : "Bob") << endl;
	return 0;
}