o = 1

n, m = input().split()
v = 0
n, m = int(n), int(m)
aa = [[0 for _ in range(m)] for _ in range(n)]
while (n * m)>=o  :
    if not v:

        for i in range(n):

            if 0 in aa[i]:
                r = i

                t = aa[i].index(0)



        v = 1
        b = t - r
        aa[r][t] = o
    else:
        t = t - 1
        r = t - b
        if   t not in range(0, m) or r not in range(0, n):
            v = 0
            continue
        aa[r][t] = o
    o += 1



for j in aa[::-1]:
    ty = []

    for i in j:

        ty.append(str(i).rjust(4))

    print(''.join(ty))