#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define F first
#define S second
#define pii pair<int, int>
#define eb emplace_back
#define all(v) v.begin(), v.end()
#define rep(i, n) for (int i = 0; i < n; ++i)
#define rep3(i, l, n) for (int i = l; i < n; ++i)
#define chmax(a, b) a = (a >= b ? a : b)
#define chmin(a, b) a = (a <= b ? a : b)
#define out(a) cout << a << endl
#define outa(a, n) rep(_, n) cout << a[_] << " "; cout << endl
#define SZ(v) (int)v.size()
#define inf (int)(1e9+7)
#define abs(x) (x >= 0 ? x : -(x))

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    // ペアにできるかはx、y各々の偶奇で決まる
    // きれいにグループに分かれる
    map<pii, int> mp;
    int n;
    cin >> n;
    rep(i, n) { int a, b; cin >> a >> b; mp[{a % 2, b % 2}]++; }
    int sum = 0;
    for (auto e : mp) sum += e.S / 2;
    if (sum % 2 == 0) out("Bob");
    else out("Alice");
    
}