import numpy as np
from math import sqrt

def make_divisors(n):
    lower_divisors , upper_divisors = [], []
    i = 1
    while i*i <= n:
        if n % i == 0:
            lower_divisors.append(i)
            if i != n // i:
                upper_divisors.append(n//i)
        i += 1
    return lower_divisors + upper_divisors[::-1]

N, H = map(int,input().split())

divs = make_divisors(N)[:-1]
# print(divs)
if ~ H in divs:
	print(-1)
	exit()

tiles = []
for div in divs:
	for _ in range(div):
		tiles.append(div)
# print(tiles)

if H > sqrt(N):
	I = N//H
else:
	I = H

tiles = np.array(tiles)
tiles = tiles.reshape(I,N//I)
if H > sqrt(N):
	tiles = tiles.T
for tile in tiles:
	print(*list(tile))