#include<bits/stdc++.h>
#define REP(x,y,z) for(int x=y;x<=z;x++)
#define FORD(x,y,z) for(int x=y;x>=z;x--)
#define MSET(x,y) memset(x,y,sizeof(x))
#define FOR(x,y) for(__typeof(y.begin()) x=y.begin();x!=y.end();x++)
#define F first
#define S second
#define MP make_pair
#define PB push_back
#define SZ size()
#define M 
void RI(){}
template<typename... T>
void RI( int& head, T&... tail ) {
    scanf("%d",&head);
    RI(tail...);
}
using namespace std;
typedef long long LL;
int main()
{
	int n;
	int x,y;
	int cnt[2][2];

	while(~scanf("%d",&n))
	{
		MSET(cnt, 0);
		REP(i,1,n)
		{
			RI(x,y);
			cnt[x%2][y%2]++;
		}

		int ans=0;
		REP(i,0,1)REP(j,0,1) ans += cnt[i][j]/2;
		puts(ans%2 ? "Alice" : "Bob");
	}
	return 0;
}