participants_amt = int(input())
participants_list = []
for _ in range(participants_amt):
    participants_list.append(list(map(int, input().split())))
for i in range(1, participants_amt):
    tmp = participants_list[i]
    j = i - 1
    while j >= 0 and sum(participants_list[j]) < sum(tmp):
        participants_list[j + 1] = participants_list[j]
        j -= 1
    participants_list[j + 1] = tmp
for participant in participants_list:
    print(*participant)