#include <bits/stdc++.h> using namespace std; int main() { int N; int cnt[4] = {}; cin >> N; while(N--) { int x, y; cin >> x >> y; if(x % 2 == 0) { if(y % 2 == 0) cnt[0]++; else cnt[1]++; } else{ if(y % 2 == 0) cnt[2]++; else cnt[3]++; } } if((cnt[0] / 2 + cnt[1] / 2 + cnt[2] / 2 + cnt[3] / 2) % 2 == 0) { cout << "Bob" << endl; } else { cout << "Alice" << endl; } return (0); }