a-a a-b a-c aaa aab aac aad aag aam aan aao aar ab- aba abb abc abd abg abm abn abo abr ac- aca acb acc acd acg acm acn aco acr ad- ada adb adc add adg adm adn ado adr ag- aga agb agc agd agg agm agn ago agr ama amb amc amd amg amm amn amo amr an- ana anb anc and ang anm ann ano anr aoa aob aoc aod aog aom aon aoo aor ar- ara arb arc ard arg arm arn aro arr baa bab bac bad bag bam ban bao bar bba bbb bbc bbd bbg bbm bbn bbo bbr bca bcb bcc bcd bcg bcm bcn bco bcr bda bdb bdc bdd bdg bdm bdo bdr bga bgb bgc bgd bgg bgm bgn bgo bgr bma bmb bmc bmd bmg bmm bmn bmo bmr bna bnb bnc bnd bng bnn bno bnr boa bob boc bod bog bom bon boo bor bra brb brd brg brm brn bro brr c-- caa cab cac cad cag cam can cao car cba cbb cbc cbd cbg cbm cbn cbo cbr cca ccb ccc ccd ccg ccm ccn cco ccr cda cdb cdc cdd cdg cdm cdn cdo cdr cga cgb cgc cgd cgg cgm cgn cgo cgr cma cmb cmc cmd cmg cmm cmn cmo cmr cn- cna cnb cnc cnd cng cnm cnn cno cnr co- coa cob coc cod cog com con coo cor cra crb crc crd crg crm crn cro crr daa dab dac dad dag dam dan dao dar dba dbb dbc dbd dbg dbm dbn dbo dbr dca dcb dcc dcd dcg dcm dcn dco dcr dda ddb ddc ddd ddg ddm ddn ddo ddr dga dgc dgd dgg dgm dgn dgr dma dmb dmc dmd dmg dmm dmn dmo dmr dna dnb dnc dnd dng dnm dnn dno dnr doa dob doc dod dog dom don doo dor dra drb drc drd drg drm drn dro drr g-d gaa gab gac gad gag gam gan gao gar gba gbc gbd gbg gbm gbn gbo gbr gca gcb gcc gcd gcg gcm gcn gco gcr gda gdb gdc gdd gdm gdn gdo gdr gga ggb ggc ggd ggg ggm ggn ggo ggr gma gmb gmc gmd gmg gmm gmn gmo gmr gna gnb gnc gnd gnm gnn gno gnr goa gob goc god gog gom gon goo gor gra grb grc grd grg grm grn gro grr m-o m-r maa mab mac mad mag mam man mao mar mba mbb mbc mbd mbg mbm mbo mbr mc- mca mcb mcc mcd mcg mcm mcn mco mcr mda mdb mdc mdd mdg mdm mdn mdo mdr mga mgb mgc mgd mgm mgn mgo mgr mma mmb mmc mmd mmg mmm mmn mmo mmr mna mnb mnc mng mnm mnn mno mnr moa mob moc mod mog mom mon moo mor mra mrb mrc mrd mrg mrm mrn mro mrr naa nab nac nad nag nam nan nao nar nba nbb nbc nbd nbg nbm nbn nbo nbr nca ncb ncc ncd ncg ncm ncn nco ncr nda ndb ndc ndd ndg ndm ndn ndo ndr nga ngb ngc ngd ngg ngm ngn ngo nma nmb nmc nmd nmg nmm nmn nmo nmr nna nnb nnc nng nnm nnn nno no- noa nob noc nod nog nom non noo nor nra nrb nrc nrd nrg nrm nrn nro nrr oaa oab oac oad oag oam oan oao oar ob- oba obb obc obd obg obm obn obo obr oc- oca ocb occ ocd ocg ocm ocn oco ocr oda odb odc odd odg odm odn odo odr oga ogc ogd ogg ogn ogo om- oma omb omc omd omg omm omn omo omr on- ona onb onc ond ong onn ono onr oo- ooa oob ooc ood oog oom oon ooo oor or- ora orb orc ord org orm orn oro orr ra- raa rab rac rad rag ram ran rao rar rba rbb rbc rbd rbg rbm rbn rbo rbr rca rcb rcc rcd rcg rcm rcn rco rcr rda rdb rdc rdd rdg rdm rdn rdo rdr rga rgb rgc rgd rgg rgn rgo rgr rma rmb rmc rmd rmg rmm rmn rmo rmr rna rnb rnc rnd rng rnm rnn rno rnr roa rob roc rod rog rom ron roo ror rra rrb rrc rrd rrg rrm rrn rrr