It may sound strange to people who were born later. But in 90s these mechanisms were in infancy. It was normal for computers to auto-login and have no password at all, processes could each read entire memory on the machine. Software was cracked the moment it came out and it was assumed people bought any software because they feared legal action rather than because they had no other way to get their hands on it -- lat…
That didn't stop people creating hard-to-crack copy-protected software. Since disk drives existed, games makers created floppy disks that industrial disk duplicators that standard computers could read, but couldn't write, and ensured their games had code to check for that. It generally wasn't feasible to replicate these special tracks with a normal floppy drive, so instead people had to reverse engineer the game and…
But they picked any word in the book, even simple ones like "the". So just entering that 20x or so would get you in.