n = int(input())

ee, eo, oe, oo = 0, 0, 0, 0
for i in range(n):
    x, y = map(int, input().split())
    xe = x % 2 == 0
    ye = y % 2 == 0
    if xe and ye:
        ee += 1
    elif xe and not ye:
        eo += 1
    elif not xe and ye:
        oe += 1
    else:
        oo += 1

if (ee // 2 + eo // 2 + oe // 2 + oo // 2) % 2 == 0:
    print('Bob')
else:
    print('Alice')