spasi za pogashenie dolga#2

n = int(input())#столбцов
m = int(input())#строк
l = []
l2 = []
num = 0

for i in range(m):
    for i in range(n):
        num += 1
        l2.append(num)
    l.append(l2)
    l2 = []
# сделали [12345][65789] и тд
for i in range(1,m,2):
    l[i] = l[i][::-1]

print(l)