a-a a-c aaa aac aag aah aan aao aar aax ac- aca acc acg ach acn aco acr acx ag- aga agc agg agh agn ago agr agx aha ahc ahg ahh ahn aho ahr ahx an- ana anc ang anh ann ano anr anx aoa aoc aog aoh aon aoo aor aox ar- ara arc arg arh arn aro arr arx ax- axa axh axn axo axr axx c-- caa cac cag cah can cao car cax cca ccc ccg cch ccn cco ccr ccx cga cgc cgg cgh cgn cgo cgr ch- cha chc chg chh chn cho chr chx cn- cna cnc cng cnh cnn cno cnr cnx co- coa coc cog coh con coo cor cox cra crc crg crh crn cro crr crx cxc cxh cxo cxr cxx gaa gac gag gah gan gao gar gca gcc gcg gch gcn gco gcr gga ggc ggg ggh ggn ggo ggr gha ghc ghg ghh ghn gho ghr gna gnc gnn gno gnr goa goc gog goh gon goo gor gox gra grc grg grh grn gro grr grx gxa haa hac hag hah han hao har hax hca hcc hcg hch hcn hco hcr hga hgc hgg hgh hgn hgo hgr hha hhc hhg hhh hhn hho hhr hna hnc hng hnh hnn hno hoa hoc hog hoh hon hoo hor hox hr- hra hrc hrg hrh hrn hro hrr hxc naa nac nag nah nan nao nar nax nca ncc ncg nch ncn nco ncr ncx nga ngc ngg ngh ngn ngo nha nhc nhg nhh nhn nhr nna nnc nng nnh nnn nno no- noa noc nog noh non noo nor nox nra nrc nrg nrn nro nrr nrx nxc oaa oac oag oah oan oao oar oax oc- oca occ ocg och ocn oco ocr ocx oga ogc ogg ogh ogn ogo ogx oha ohc ohg ohh ohn oho ohr on- ona onc ong onh onn ono onr onx oo- ooa ooc oog ooh oon ooo oor oox or- ora orc org orh orn oro orr orx ox- oxa oxc oxn oxo oxx ra- raa rac rag rah ran rao rar rax rca rcc rcg rch rcn rco rcr rcx rga rgc rgg rgh rgn rgo rgr rgx rh- rha rhc rhg rhh rhn rho rhr rna rnc rng rnh rnn rno rnr roa roc rog roh ron roo ror rox rra rrc rrg rrh rrn rrr rxr xaa xac xag xan xar xch xcr xcx xna xnc xno xoa xoc xog xon xoo xor xox xrc xrx xxo xxx