-ic a-a a-b a-c a-i aaa aab aac aag aai aak aan aao aar ab- aba abb abc abg abi abk abn abo abr ac- aca acb acc acg aci ack acn aco acr ag- aga agb agc agg agi agk agn ago agr ai- aia aib aic aig aii aik ain aio air aka akb akc akg aki akk akn ako akr an- ana anb anc ang ani ank ann ano anr aoa aob aoc aog aoi aok aon aoo aor ar- ara arb arc arg ari ark arn aro arr baa bab bac bag bai bak ban bao bar bba bbb bbc bbg bbi bbk bbn bbo bbr bca bcb bcc bcg bci bck bcn bco bcr bga bgb bgc bgg bgi bgk bgn bgo bgr bi- bia bib bic big bii bik bin bio bir bka bkb bkc bkg bkk bkn bko bkr bna bnb bnc bng bni bnk bnn bno bnr boa bob boc bog boi bok bon boo bor bra brb brg bri brk brn bro brr c-- caa cab cac cag cai cak can cao car cba cbb cbc cbg cbi cbk cbn cbo cbr cca ccb ccc ccg cci cck ccn cco ccr cga cgb cgc cgg cgi cgn cgo cgr ci- cia cib cic cig cii cik cin cio cir cka ckb ckc cki cko cn- cna cnb cnc cng cni cnn cno cnr co- coa cob coc cog coi cok con coo cor cra crb crc crg cri crk crn cro crr gaa gab gac gag gai gak gan gao gar gba gbc gbg gbi gbk gbn gbo gbr gca gcb gcc gcg gci gck gcn gco gcr gga ggb ggc ggg ggi ggn ggo ggr gia gib gic gig gii gik gin gio gir gka gkb gkn gko gna gnb gnc gni gnn gno gnr goa gob goc gog goi gok gon goo gor gra grb grc grg gri grk grn gro grr ia- iaa iab iac iag iai ian iao iar iba ibb ibc ibg ibi ibk ibn ibo ibr ica icb icc icg ici ick icn ico icr iga igb igc igg igi igk ign igo igr iia iib iic iii iin iio iir ika ikb ikc iki ikk iko ikr in- ina inb inc ing ini ink inn ino inr io- ioa iob ioc iog ioi ion ioo ior ir- ira irb irc irg iri irk irn iro irr ka- kaa kab kac kag kai kak kan kao kar kba kbb kbc kbi kbk kbn kbo kbr kca kcb kcc kcg kci kck kcn kcr kga kgb kgc kgi kgo kia kib kic kig kii kik kin kio kir kkb kkc kki kkk kkn kkr kn- kna knc kng kni knk knn kno knr koa kob koc kog koi kok kon koo kor kra krc krg kri krk krn kro krr n-i naa nab nac nag nai nak nan nao nar nba nbb nbc nbg nbi nbk nbn nbo nbr nca ncb ncc ncg nci nck ncn nco ncr nga ngb ngc ngg ngi ngk ngn ngo nia nib nic nig nii nik nin nio nir nka nkc nki nkk nkn nko nkr nna nnb nnc nng nni nnk nnn nno no- noa nob noc nog noi nok non noo nor nra nrb nrc nrg nri nrk nrn nro nrr o-i oaa oab oac oag oai oak oan oao oar ob- oba obb obc obg obi obk obn obo obr oc- oca ocb occ ocg oci ock ocn oco ocr oga ogc ogg ogi ogn ogo oia oib oic oii oik oin oio oir oka okb okc okg oki okk oko okr on- ona onb onc ong oni onk onn ono onr oo- ooa oob ooc oog ooi ook oon ooo oor or- ora orb orc org ori ork orn oro orr ra- raa rab rac rag rai rak ran rao rar rba rbb rbc rbg rbi rbk rbn rbo rbr rca rcb rcc rcg rci rcn rco rcr rga rgb rgc rgg rgi rgk rgn rgo rgr ria rib ric rig rii rik rin rio rir rkb rkc rkg rkk rko rna rnb rnc rng rni rnn rno rnr roa rob roc rog roi rok ron roo ror rra rrb rrc rrg rri rrk rrn rrr