n, m = map(int,input().split())
a = [list(map(int,input().split())) for i in range(n)]

ans = []
for i in range(m):
	sl = [-1] * n
	for j in range(n):
		mx = 0
		ind = -1
		for k in range(n):
			if sl[k] != -1: continue
			if mx < a[k][j]:
				mx = a[k][j]
				ind = k
		if mx == 0:
			print(-1)
			exit()
		sl[ind] = j
		a[ind][j] -= 1
	
	v = [0] * n
	for j in range(n):
		v[j] = sl[j] + 1
	ans.append(v)

for i in range(m):
	print(*ans[i])