/*
 * Advent Calendar Contest 2017(2017-12-01 00:00:00〜2017-12-25 00:00:00)
 * #A 32ms
 */

#include <iostream>
using namespace std;

#define fastcin {\
    cin.tie(0);\
    ios::sync_with_stdio(false);\
}
#define REP(i, a) for(int i = 0; i < a; i++)
#define scan(x) cin >> x
#define print(x) cout << x << "\n"

int main() {
    fastcin;
    int N; scan(N);
    int s[N];
    long x[N], y[N];
    int count[4] = {};
    int ans = 0;
    REP(i, N) {
        cin >> x[i] >> y[i];
        if (x[i]%2==0) {
            if (y[i]%2==0) s[i] = 0;
            else s[i] = 1;
        } else {
            if (y[i]%2==0) s[i] = 2;
            else s[i] = 3;
        }
        if (count[s[i]] > 0) {
            count[s[i]]--;
            ans++;
        } else count[s[i]]++;
    }

    if (ans%2!=0) print("Alice");
    else print("Bob");

    return 0;
}