-ic a-a a-b a-c a-i aaa aab aac aag aai aak aan aao aap aar ab- aba abb abc abg abi abk abn abo abp abr ac- aca acb acc acg aci ack acn aco acp acr ag- aga agb agc agg agi agk agn ago agp agr ai- aia aib aic aig aii aik ain aio aip air aka akb akc akg aki akk akn ako akp akr an- ana anb anc ang ani ank ann ano anp anr aoa aob aoc aog aoi aok aon aoo aop aor ap- apa apb apc apg api apk apn apo app apr ar- ara arb arc arg ari ark arn aro arp arr b-p baa bab bac bag bai bak ban bao bap bar bba bbb bbc bbg bbi bbk bbn bbo bbp bbr bca bcb bcc bcg bci bck bcn bco bcp bcr bga bgb bgc bgg bgi bgk bgn bgo bgp bgr bi- bia bib bic big bii bik bin bio bip bir bka bkb bkc bkg bkk bkn bko bkp bkr bna bnb bnc bng bni bnk bnn bno bnp bnr boa bob boc bog boi bok bon boo bop bor bpa bpb bpc bpg bpi bpn bpo bpp bpr bra brb brg bri brk brn bro brp brr c-- caa cab cac cag cai cak can cao cap car cba cbb cbc cbg cbi cbk cbn cbo cbp cbr cca ccb ccc ccg cci cck ccn cco ccp ccr cga cgb cgc cgg cgi cgn cgo cgp cgr ci- cia cib cic cig cii cik cin cio cip cir cka ckb ckc cki cko cn- cna cnb cnc cng cni cnn cno cnp cnr co- coa cob coc cog coi cok con coo cop cor cpa cpb cpc cpg cpi cpk cpn cpo cpp cpr cra crb crc crg cri crk crn cro crp crr g-p gaa gab gac gag gai gak gan gao gap gar gba gbc gbg gbi gbk gbn gbo gbp gbr gca gcb gcc gcg gci gck gcn gco gcp gcr gga ggb ggc ggg ggi ggn ggo ggp ggr gia gib gic gig gii gik gin gio gip gir gka gkb gkn gko gkp gna gnb gnc gni gnn gno gnp gnr goa gob goc gog goi gok gon goo gop gor gpa gpb gpc gpg gpi gpk gpn gpo gpp gpr gra grb grc grg gri grk grn gro grp grr ia- iaa iab iac iag iai ian iao iap iar iba ibb ibc ibg ibi ibk ibn ibo ibp ibr ica icb icc icg ici ick icn ico icp icr iga igb igc igg igi igk ign igo igp igr iia iib iic iii iin iio iip iir ika ikb ikc iki ikk iko ikr in- ina inb inc ing ini ink inn ino inp inr io- ioa iob ioc iog ioi ion ioo iop ior ipa ipb ipc ipg ipi ipn ipo ipp ipr ir- ira irb irc irg iri irk irn iro irp irr ka- kaa kab kac kag kai kak kan kao kap kar kba kbb kbc kbi kbk kbn kbo kbp kbr kca kcb kcc kcg kci kck kcn kcp kcr kga kgb kgc kgi kgo kgp kia kib kic kig kii kik kin kio kip kir kkb kkc kki kkk kkn kkp kkr kn- kna knc kng kni knk knn kno knp knr koa kob koc kog koi kok kon koo kop kor kpa kpc kpi kpk kpn kpo kpp kpr kra krc krg kri krk krn kro krp krr n-i naa nab nac nag nai nak nan nao nap nar nba nbb nbc nbg nbi nbk nbn nbo nbp nbr nca ncb ncc ncg nci nck ncn nco ncp ncr nga ngb ngc ngg ngi ngk ngn ngo ngp nia nib nic nig nii nik nin nio nip nir nka nkc nki nkk nkn nko nkp nkr nna nnb nnc nng nni nnk nnn nno nnp no- noa nob noc nog noi nok non noo nop nor npa npb npc npg npi npn npo npp npr nra nrb nrc nrg nri nrk nrn nro nrp nrr o-i oaa oab oac oag oai oak oan oao oap oar ob- oba obb obc obg obi obk obn obo obp obr oc- oca ocb occ ocg oci ock ocn oco ocp ocr oga ogc ogg ogi ogn ogo ogp oia oib oic oii oik oin oio oip oir oka okb okc okg oki okk oko okp okr on- ona onb onc ong oni onk onn ono onp onr oo- ooa oob ooc oog ooi ook oon ooo oop oor op- opa opb opc opg opi opk opn opo opp opr or- ora orb orc org ori ork orn oro orp orr p-p paa pab pac pag pai pak pan pao pap par pba pbb pbc pbg pbi pbk pbn pbo pbp pbr pca pcb pcc pcg pci pck pcn pco pcp pcr pga pgb pgc pgg pgi pgk pgn pgo pgp pgr pia pib pic pig pii pik pin pio pip pir pka pkb pkc pkg pki pkn pko pkp pkr pn- pna pnb pnc png pni pnk pnn pno pnp pnr poa pob poc pog poi pok pon poo pop por ppa ppb ppc ppg ppi ppk ppn ppo ppp ppr pra prb prc prg pri prk prn pro prp prr ra- raa rab rac rag rai rak ran rao rap rar rba rbb rbc rbg rbi rbk rbn rbo rbp rbr rca rcb rcc rcg rci rcn rco rcp rcr rga rgb rgc rgg rgi rgk rgn rgo rgp rgr ria rib ric rig rii rik rin rio rip rir rkb rkc rkg rkk rko rkp rna rnb rnc rng rni rnn rno rnp rnr roa rob roc rog roi rok ron roo rop ror rpa rpb rpc rpg rpi rpk rpn rpo rpp rpr rra rrb rrc rrg rri rrk rrn rrp rrr