//スマホコーディング
#include<iostream>
using namespace std;

int main(){
int T[2][2] = {0};
int n,a,b;
cin>>n;
while(n-- >0){
cin>>a>>b;
T[a%2][b%2]++;
}

int pairs = 0;

for(int i = 0; i <= 1; i++)
for(int j = 0; j <= 1; j++)
pairs += T[i][j]/2;

if(pairs%2) cout << "Alice" << endl;
else cout << "Bob" << endl;

return 0;
}