15.py

a, b = int(input()), int(input())

lenn = len(str(a * b))


for i in range(1, a + 1):
    arr = []
    for j in range(1, b + 1):
        if j % 2 == 1:
            n = a * (j - 1) + i
            arr.append(" " * (lenn - len(str(n))) + str(n))
        else:
            n = a * (j) - (i - 1)
            arr.append(" " * (lenn - len(str(n))) + str(n))
    print(*arr)