import heapq
import sys

def heap_sort(a):
    heap = []
    for i in a:
        heapq.heappush(heap, i)
    for i in range(len(a)):
        a[i] = heapq.heappop(heap)

N = int(sys.stdin.readline().rstrip())
alpha_list = []
count = N
for i in range(N):
    tmp = sys.stdin.readline().rstrip()
    if (len(tmp), tmp) in alpha_list:
        count -= 1
        continue
    alpha_list.append((len(tmp),tmp))

heap_sort(alpha_list)
for i in range(count):
    print(alpha_list[i][1])