I could give a fuck about avoiding swear words, but if you want to avoid slurs and eyebleach-inducing ideas and still have any sort of compact representation, I suspect we have to look not at problematic letters but problematic groups of letters. There's nothing intrinsically wrong with the letter E. Not with G, I, N, or R, but you can sure get a lot of attention you don't want by arranging them in the wrong order. K and Y aren't bad either, unless you're hating on Jewish people.
So maybe there's a 5:4 or a 5:3 encoding out there where you avoid making syllables.
I could give a fuck about avoiding swear words, but if you want to avoid slurs and eyebleach-inducing ideas and still have any sort of compact representation, I suspect we have to look not at problematic letters but problematic groups of letters. There's nothing intrinsically wrong with the letter E. Not with G, I, N, or R, but you can sure get a lot of attention you don't want by arranging them in the wrong order. K and Y aren't bad either, unless you're hating on Jewish people.
So maybe there's a 5:4 or a 5:3 encoding out there where you avoid making syllables.