# import sys; input = sys.stdin.buffer.readline
# sys.setrecursionlimit(10**7)
from collections import defaultdict
con = 10 ** 9 + 7; INF = float("inf")

def getlist():
	return list(map(int, input().split()))

#処理内容
def main():
	N = int(input())
	L = []
	for i in range(N):
		PA = getlist()
		L.append(PA)

	ans = []
	for loop in range(1, 101):
		for i in range(N):
			if L[i][0] >= loop:
				ans.append(L[i][loop])

	print(*ans)


if __name__ == '__main__':
	main()