n = int(input())

A = [list(map(int, input().split()[1:][::-1])) for i in range(n)]
B = []

cnt = sum([len(a) for a in A])
i = -1
while cnt > 0:
    i += 1
    if not A[i % n]:
        continue
    B.append(A[i % n].pop())
    cnt -= 1

print(*B)