#include <iostream>
#include <vector>

void solve() {
    std::vector<int> cnt(4, 0);

    int n;
    std::cin >> n;
    while (n--) {
        int x, y;
        std::cin >> x >> y;

        x %= 2, y %= 2;
        ++cnt[(x << 1) + y];
    }

    int sum = 0;
    for (auto x : cnt) sum += x / 2;

    std::cout << (sum % 2 == 0 ? "Bob" : "Alice")
              << std::endl;
}

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

    solve();

    return 0;
}