I124Q

n,m=map(int,input().split())
a=[0]*n
for i in range(n):
    a[i]=[0]*m
k=0
for i in range(n):
    for j in range(m):
        k=k+1
        a[j][i]=k

for i in range(n):
    for j in range(m//2):
        if i % 2 == 1:
            a[j][i],a[-j-1][i] = a[-j-1][i], a[j][i]

for i in range(n):
    print(*a[i])