Keys...  Perhaps these are another trinary thing?  Adam thinks
they have three levels

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2
0 0 1 1 1 2 2 2 0 0 0 1 1 1 2 2 2 0 0 0 1 1 1 2 2 2
1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2

red key:	lmhhlmlllhh
green key:	hmlhhmmmlmm
black key:	hhlhlmhllmm

red key:	01220100022
green key:	21022111011
black key:	22020120011

		XVBZFMUC?NN
red key:	01220100022
green key:	21022111011
black key:	22020120011
		HNRZFMEC?VV
		
		BDX?TMEWZLL
red key:	21002122200
green key:	01200111211
black key:	00202102211
		RLH?TMUWZDD

black key:	00202102211
green key:	01200111211
red key:	21002122200


low = 0, insert 0
red key:	001 AI 220 XH 100 IA 022 HX	AXIH HIXA IHAX XAHI
green key:	021 GU 022 HX 111 MM 011 DL	GHMD DMHG UXML LMXU
black key:	022 HX 020 FF 120 OG 011 DL	HFOD DOFH XFGL LGFX

low = 0, append 0
red key:	012 EU 201 SK 000 ?? 220 XH	ES?X X?SE UK?H H?KU
green key:	210 UE 221 YQ 110 LD 110 LD	UYLL LLYU EQDD DDQE
black key:	220 XH 201 SK 200 RB 110 LD	XSRL LRSX HKBD DBKH

low = 2, insert 0
red key:	021 GU 002 BR 122 QY 200 RB	GBQR RQBG URYB BYRO
green key:	001 AI 200 RB 111 MM 211 VN	ARMV VMRA IBMN NMAI
black key:	000 ?? 202 TT 102 KS 211 VN	?TKV VKT? ?TSN NST 
                                                               ^^^^

Byron and Main Street?  We can do that.

Actually, Main street in Byron