#include<bits/stdc++.h>
using lint=long long;
int main(){
    std::cin.tie(nullptr);std::ios_base::sync_with_stdio(false);
    std::cout.setf(std::ios_base::fixed);std::cout.precision(15);
    std::vector<lint>a(4);
    lint n;std::cin>>n;
    while(n--){
        lint x,y;std::cin>>x>>y;
        a.at(x%2+y%2*2)++;
    }
    lint ans=0;
    for(lint x:a)ans+=x/2;
    std::cout<<(ans%2?"Alice":"Bob")<<'\n';
}