Alice and Bob are playing a game with n piles of stones. It is guaranteed that n is an even number. The i-th pile has a_i stones.

Alice and Bob will play a game alternating turns with Alice going first.

On a player's turn, they must choose exactly n/2 nonempty piles and independently remove a positive number of stones from each of the chosen piles. They can remove a different number of stones from the piles in a single turn. The first player unable to make a move loses (when there are less than n/2 nonempty piles).

Given the starting configuration, determine who will win the game.

Input

The first line contains one integer n (2 ≤ n ≤ 50) — the number of piles. It is guaranteed that n is an even number.

The second line contains n integers a_1, a_2, …, a_n (1 ≤ a_i ≤ 50) — the number of stones in the piles.

Output

Print a single string "Alice" if Alice wins; otherwise, print "Bob" (without double quotes).

Examples

Input


2
8 8


Output


Bob


Input


4
3 1 4 1


Output


Alice

Note

In the first example, each player can only remove stones from one pile (2/2=1). Alice loses, since Bob can copy whatever Alice does on the other pile, so Alice will run out of moves first.

In the second example, Alice can remove 2 stones from the first pile and 3 stones from the third pile on her first move to guarantee a win.
from fractions import gcd
from math import factorial, ceil, sqrt, atan2, log, pi, e, asin,acos, cos, sin, floor, atan
from itertools import *
from fractions import Fraction
import string
import copy
import random
import bisect
from decimal import *
from collections import deque
from sys import *
digs = string.digits + string.ascii_letters

def id_generator(size=20, chars=string.digits):
    return ''.join(random.choice(chars) for _ in range(size))
 
def mp():
    return map(int,str(raw_input()).strip().split())

clear=stdout.flush()

mod=10**9+7

n=input()
l=list(mp())
l.sort()
if l[0]==l[-1]:
	print "Bob"
else:
	a=[]
	b=[]
	for i in range(n/2):
		a+=[l[i]]
	for i in range(n/2,n):
		b+=[l[i]]

	# print a
	# print b  

	flag=1
	for i in range(n/2):
		if a[i]==b[i]:
			flag=0

	if flag:
		print "Alice"
		exit()

	if a[0]==a[-1]:
		print "Bob"
	else:
		print "Alice"








