H21K Sequence
It was a stupid code used in a dumb show. Two guys used it to fix a broken spaceship and pretend they were smart. It also made their friendship look like a bunch of fake training sessions from hell.
'H21K? What the hell is that?', @jason_in_space
'I used H21K to cheat on my exam.', @cheater420
'H21K is the only thing that saved my life.', @survivor2023