n,k=map(int,input().split())
m=k//n
for i in range(m):
	print(" ".join([n*i+j for j in range(1,n+1)]))
l=k-m*n
print(" ".join([n*m+j for j in range(1,l+1)]+[n*(m+1)]+[n*m+j for j in range(l+1,n)]))
for i in range(m+1,n):
	print(" ".join([n*i+j for j in range(n+1,1,-1)]))