n = int(input())
a = []
p_sm = 0
for _ in range(n):
    pp, *aa = map(int, input().split())
    li = list(aa)[::-1]
    a.append(li)
    p_sm += pp

ans = []
i = 0
for _ in range(p_sm):
    while not a[i]:
        i = (i + 1) % n

    pp = a[i].pop()
    ans.append(pp)
    i = (i + 1) % n

print(*ans)