a-a a-c aaa aac aad aag aan aar aau aax ac- aca acc acd acg acn acr acu acx ad- ada adc add adg adn adr adu adx ag- aga agc agd agg agn agr agu agx an- ana anc and ang ann anr anu anx ar- ara arc ard arg arn arr aru arx au- aua auc aud aug aun aur aux ax- axa axn axr axx c-- caa cac cad cag can car cau cax cca ccc ccd ccg ccn ccr ccu ccx cda cdc cdd cdg cdn cdr cdu cdx cga cgc cgd cgg cgn cgr cgu cn- cna cnc cnd cng cnn cnr cnu cnx cra crc crd crg crn crr cru crx cua cuc cud cug cun cur cuu cxc cxr cxx daa dac dad dag dan dar dau dax dca dcc dcd dcg dcn dcr dcu dcx dda ddc ddd ddg ddn ddr ddu ddx dga dgc dgd dgg dgn dgr dgu dna dnc dnd dng dnn dnr dra drc drd drg drn drr dru drx dua duc dud dug dun dur dux dxc dxd dxn dxr dxx g-d gaa gac gad gag gan gar gau gca gcc gcd gcg gcn gcr gcu gda gdc gdd gdn gdr gdu gdx gga ggc ggd ggg ggn ggr ggu gna gnc gnd gnn gnr gnu gra grc grd grg grn grr gru grx gu- gua guc gud gug gun gur guu gxa naa nac nad nag nan nar nau nax nca ncc ncd ncg ncn ncr ncu ncx nda ndc ndd ndg ndn ndr ndu nga ngc ngd ngg ngn ngu nna nnc nng nnn nnu nra nrc nrd nrg nrn nrr nru nrx nua nuc nud nug nun nur nuu nux nxc nxd ra- raa rac rad rag ran rar rau rax rca rcc rcd rcg rcn rcr rcu rcx rda rdc rdd rdg rdn rdr rdu rdx rga rgc rgd rgg rgn rgr rgx rna rnc rnd rng rnn rnr rnu rra rrc rrd rrg rrn rrr rru rua ruc rud rug run rur ruu rux rxr ua- uaa uac uad uag uan uar uau uca ucc ucd ucg ucn ucr ucu uda udc udd udg udn udr udu udx uga ugc ugg ugn ugr ugu ugx un- una unc und ung unn unr unu unx ur- ura urc urd urg urn urr uru urx uua uuc uug uun uur uuu uxc uxr uxu xaa xac xad xag xan xar xau xcd xcr xcx xda xdc xdr xna xnc xnu xrc xrd xrx xun xxx