from collections import defaultdict as dd
from sys import exit
n = int(input())
bridge = [list(map(int, input().split()))for _ in range(n-1)]
parent = [-1]*n
cnt = [0]*n


def find(x):
    if parent[x] < 0: return x
    parent[x] = find(parent[x])
    return parent[x]


def union(x, y):
    px, py = find(x), find(y)
    if px==py: return
    if parent[px] > parent[py]: px, py = py, px
    parent[px] += parent[py]
    parent[py] = px


for x, y in bridge:
    union(x, y)
    cnt[x] += 1
    cnt[y] += 1
dic = dd(lambda: 0)
for i in range(n):
    dic[find(i)] += 1
if len(dic)==1:
    print("Bob")
elif len(dic)==2:
    x, y = dic.keys()
    if dic[x] > dic[y]: x, y = y, x
    if dic[x]==1:
        for i in range(n):
            if not(i==x or cnt[i]==2):
                print("Alice")
                exit()
        print("Bob")
    else:
        print("Alice")
else:
    print("Alice")