// yukicoder: No.601 Midpoint Erase
// 2019.6.23 bal4u

#include <stdio.h>

#if 1
#define gc() getchar_unlocked()
#else
#define gc() getchar()
#endif

int in()    // 非負整数の入力
{
	int n = 0, c = gc();
	do n = 10 * n + (c & 0xf); while ((c = gc()) >= '0');
	return n;
}


int cin() {   // 特殊入力
	int n, c;
	while ((c = gc()) >= '0') n = c;
	return n;
}

int a[4];

int main()
{
	int i, x, y, N, ans;

	N = in();
	while (N--) {
		x = cin() & 1, y = cin() & 1;
		a[(x << 1) | y]++;
	}
	ans = 0;
	i = 4; while (i--) {
		if ((a[i] & 3) >= 2) ans = !ans;
	}
	puts(ans? "Alice": "Bob");
	return 0;
}