N = int(input())

for i in range(N):
    x_i = input()
    
    x_i = x_i.split(" ")
    intx_i =[int(x) for x in x_i]
    #print(intx_i)

even_even = 0
odd_even = 0
even_odd = 0
odd_odd = 0

for i in range(N):
    if( intx_i[0]%2 == 0 )and(intx_i[1]%2 == 0):
        even_even = even_even + 1
    elif( intx_i[0]%2 == 1 )and(intx_i[1]%2 == 0):
        odd_even = odd_even + 1
    elif( intx_i[0]%2 == 0 )and(intx_i[1]%2 == 1):
        even_odd = even_odd + 1
    elif( intx_i[0]%2 == 1 )and(intx_i[1]%2 == 1):
        odd_odd = odd_odd +1
    else:
        print("number is not int")

count = ((even_even//2)+(odd_even//2)+(even_odd//2)+(odd_odd//2))%2
if count==1:
    print("Alice")
else:
    print("Bob")