def split(arr: "list", batch: "int") -> "list[list]":
    size = len(arr)
    if size <= batch:
        return [arr]
    step = size // batch
    res = [arr[i * batch: (i + 1) * batch] for i in range(step)]
    if size % batch:
        res.append(arr[step * batch:])
    return res


if __name__ == '__main__':
    ll = list(range(1, 29))
    print(ll)
    print(split(ll, 50))