my_list = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'k']
K = 4


def drop(my_list, K):
    len_list = len(my_list)
    res = []
    for i in range(0, len_list):
        if (i + 1) % K != 0:
            res.append(my_list[i])
    return res


def drop_slice(my_list, K):
    len_list = len(my_list)
    if K > len_list:
        return my_list
    res = list()
    for i in range(0, (len_list // K) * K, K):
        new = my_list[i: (i + K - 1)]
        res += new
    res += my_list[len_list: (len_list - (len_list % K) - 1):-1]
    return res


if __name__ == '__main__':
    for each in range(1, 12):
        result = drop_slice(my_list, each)
        print(f'K = {each}: {result}\n')