After finding this post, I totally lost my faith in 4-digit systems. It seems not even Simon Reinhard has a pre-made list, and he said he may have “seen every of the 10.000 images once or twice,” which tells a lot about how big such list would be.
However, having a phonetic system that can support 4-digit numbers is helpful since it would allow you to have a complete 2-card system without complex rules, so I made a few modifications.
The relationships between digits and vowels are the same. However, I added the following rules:
- The word is only read up to the second consonant.
- Spaces, hyphens, dashes, silent consonants, or invalid consonant sounds are completely ignored, so the word is read as if they didn’t exist.
Now it’s much easier to fill the 2-digit numbers and the combinations are well defined:
1-Digit Names
Sequences: C, V (there can’t be anything after).
Examples: L (Death Note), Yi (Abominable), Io (Code Vein), yoyo (toy).
2-Digit Words
Sequences: CC or VC (if the former, then there may be other letters ahead because they won’t be read. The former sequence is preferable).
Examples:
Plate, Fred (The Flintstones), Scooby-doo (Scooby-Doo), glass.
3-Digit Words
Sequences: CVC or VCC (there may be anything after. The former is preferable).
Examples: door, cobweb, He-Man (Masters of the Universe), Saitama (One-Punch Man).
4-Digit Words
Sequence: VCVC
Examples: abacus, onion, Alistar (League of Legends), Ezio Auditore (Assassin’s Creed).
2-Card System
As @TheHumanTim is doing here, I think it’s a good idea to halve the suit-pairs by using a list of people and a list of objects (people = red first and objects = black first).
Doing that, you can use all digits from 0 to 7 to encode suit-pairs. 8 and 9 will represent Jacks and Queens, respectively. The King may be represented by either no-digit (if it appears first) or 3 (if it appears only in the second position).
If the picture cards appear second, then use 4-digit numbers by, let’s say, adding 9 to the thousands digit. The final number will be:
9 - picture card code - suit number code - number card
If there are two kings, then just use 1-digit numbers, which will encode just the suit pairs.
These rules are still too complex for my taste, though. Since now the 4-digit numbers would have utility for cards only, I’d prefer another strategy, which I may post later on the forum.