import java.util.Arrays; import java.util.Scanner; public class Main{ static Scanner s=new Scanner(System.in); static int gInt(){ return s.nextInt(); } public static void main(String[]$){ int n=gInt(); int[]c=new int[4]; for(int i=0;i<n;++i) { int x=gInt(),y=gInt(); x=x%2*2; y=y%2; ++c[x+y]; } int sum=Arrays.stream(c).map(i->i/2).sum(); System.out.println(sum%2==0?"Bob":"Alice"); } }