#include <bits/stdc++.h>
using namespace std;


int main() {
    
int N;
int OO=0;
int OE=0;
int EO=0;
int EE=0;

cin >> N;
vector<int>X(N);
vector<int>Y(N);
for(int i=0;i<N;i++){
    cin >> X.at(i) >> Y.at(i);
    if(X.at(i)%2==1&&Y.at(i)%2==1){
        OO++;
    }
    if(X.at(i)%2==1&&Y.at(i)%2==0){
        OE++;
    }
    if(X.at(i)%2==0&&Y.at(i)%2==1){
        EO++;
    }
    if(X.at(i)%2==0&&Y.at(i)%2==0){
        EE++;
    }
}

if((OO/2+OE/2+EO/2+EE/2)%2==1){
    cout << "Alice";
}
else{
    cout << "Bob";
}


}