n, m = map(int, input().split())
a = [list(map(int, input().split())) for _ in range(n)]
for i in range(n):
    cnt = 0
    for j in range(n):
        cnt += a[i][j]
    if cnt != m:
        print(-1)
        exit()
for j in range(n):
    cnt = 0
    for i in range(n):
        cnt += a[i][j]
    if cnt != m:
        print(-1)
        exit()


for _ in range(m):
    res = [0]*n
    s = set()
    for j in range(n):
        for i in range(n-1, -1, -1):
            if a[i][j] and i not in s:
                s.add(i)
                res[i] = j+1
                a[i][j] -= 1
                break
    print(*res)