#include <bits/stdc++.h>
#define REP(i,n,N) for(int i=n;i<(int)N;i++)
#define RREP(i,n,N) for(int i=N-1;i>=n;i--)
#define p(s) cout<<(s)<<endl
#define CK(n,a,b) ((a)<=(n)&&(n)<(b))
#define F first
#define S second
typedef long long ll;
using namespace std;
const int inf=1e9+7;

int a,b,c,n;
string s;
int cnt[4];
int main() {
	cin>>n;
	REP(i,0,n){
		cin>>a>>b;
		if(a%2&&b%2) cnt[0]++;
		else if(a%2&&b%2==0) cnt[1]++;
		else if(a%2==0&&b%2) cnt[2]++;
		else cnt[3]++;
	}
	int sum=0;
	REP(i,0,4) sum+=cnt[i]/2;

	p((sum%2)?"Alice":"Bob");
	return 0;
}