Naknaknak Nak? Naknak Nak. Naknak nak?

A duck rushes in, and announces:

Naknaknak Nak? Naknak Nak. Naknak nak? Nananak Nak Naknak Nananak Naknak naknaknak Naknak naknaknak Naknak nak! Naknaknak Nak? Naknak naknaknak Naknaknak Naknaknak Naknak nak. Nananak Nak Naknaknak Nananak Naknak Nanak Naknaknak Nak? Naknaknak Nanananak

What pop group did the duck announce?

Well, it is the NakNak (or Duck) cipher challenge. For this, we convert each ASCII character to the hexadecimal equivalent, and then use:

0 = ‘Nak’,
1 = ‘Nanak’,
2 = ‘Nananak’,
3 = ‘Nanananak’,
4 = ‘Nak?’,
5 = ‘nak?’,
6 = ‘Naknak’,
7 = ‘Naknaknak’,
8 = ‘Nak.’,
9 = ‘Naknak.’,
A (10) = ‘Naknaknaknak’,
B (11) = ‘nanak’,
C (12) = ‘naknak’,
D (13) = ‘nak!’,
E (14) = ‘nak.’,
F (15) = ‘naknaknak’.

The character ‘a’ is “61” in hex, and so this is “Naknak Nanak”.

a 0x61, b 0x62, c 0x63, d 0x64, e 0x65, f 0x66, g 0x67, h 0x68, i 0x69, j 0x6A, k 0x6B…