lines, columns = [int(i) for i in input().split()]
numbers = [i for i in range(int(lines * columns))]

for i in range(len(numbers)):
    if numbers[i] < 10:
        numbers[i] = f'__{numbers[i]}'
    elif 10 <= numbers[i] < 100:
        numbers[i] = f'_{numbers[i]}'
    else:
        numbers[i] = str(numbers[i])

matrix = []
for i in range(lines):
    matrix.append(numbers[i*columns:i*columns + columns])

for i in matrix:
    if matrix.index(i) % 2 == 0:
        for j in i:
            print(j, end="")
        print()
        continue
    for j in i[::-1]:
        print(j, end="")
    print()