-ic a-a a-b a-c a-i a-t aaa aab aac aaf aai aak aam aan aao aar aat ab- aba abb abc abf abi abk abm abn abo abr abt ac- aca acb acc acf aci ack acm acn aco acr act af- afa afb afc aff afi afk afm afn afo afr aft ai- aia aib aic aif aii aik aim ain aio air ait aka akb akc aki akk akm akn ako akr ama amb amc amf ami amk amm amn amo amr amt an- ana anb anc anf ani ank anm ann ano anr ant aoa aob aoc aof aoi aok aom aon aoo aor aot ar- ara arb arc arf ari ark arm arn aro arr art at- ata atb atc atf ati atm atn ato atr att baa bab bac baf bai bak bam ban bao bar bat bba bbb bbc bbf bbi bbk bbm bbn bbo bbr bbt bca bcb bcc bcf bci bck bcm bcn bco bcr bct bfa bfb bfc bff bfi bfm bfn bfo bfr bft bi- bia bib bic bif bii bik bim bin bio bir bit bka bkb bkc bkf bkk bkm bkn bko bkr bkt bma bmb bmc bmf bmi bmk bmm bmn bmo bmr bmt bna bnb bnc bnf bni bnk bnn bno bnr bnt boa bob boc bof boi bok bom bon boo bor bot bra brb brf bri brk brm brn bro brr brt bta btb btc btf bti btk btm btn bto btr btt c-- caa cab cac caf cai cak cam can cao car cat cba cbb cbc cbf cbi cbk cbm cbn cbo cbr cbt cca ccb ccc ccf cci cck ccm ccn cco ccr cct cfa cfb cfc cff cfi cfk cfm cfn cfo cfr cft ci- cia cib cic cif cii cik cim cin cio cir cit cka ckb ckc cki ckm cko ckt cma cmb cmc cmf cmi cmk cmm cmn cmo cmr cmt cn- cna cnb cnc cnf cni cnm cnn cno cnr cnt co- coa cob coc cof coi cok com con coo cor cot cra crb crc crf cri crk crm crn cro crr crt cta ctb ctc ctf cti ctk ctm ctn cto ctr ctt faa fab fac faf fai fak fam fan fao far fat fba fbb fbc fbf fbi fbk fbm fbn fbo fbr fbt fca fcb fcc fcf fci fck fcm fcn fco fcr fct ffa ffc fff ffi ffk ffm ffn ffo ffr fft fia fib fic fif fii fik fim fin fir fit fka fkb fkc fkf fki fkk fkm fkt fma fmb fmc fmf fmi fmm fmn fmo fmr fmt fna fnb fnc fnf fni fnk fnm fnn fnr fnt foa fob foc fof foi fok fom fon foo for fot fra frb frc frf fri frk frm frn fro frr frt fta ftb ftc ftf fti ftk ftm ftn fto ftr ftt i-f ia- iaa iab iac iaf iai iam ian iao iar iat iba ibb ibc ibf ibi ibk ibm ibn ibo ibr ibt ica icb icc icf ici ick icm icn ico icr ict ifa ifb ifc iff ifi ifm ifn ifo ifr ift iia iib iic iif iii iim iin iio iir iit ika ikb ikc ikf iki ikk iko ikr ikt im- ima imb imc imf imi imm imn imo imt in- ina inb inc inf ini ink inm inn ino inr int io- ioa iob ioc iof ioi iom ion ioo ior iot ir- ira irb irc irf iri irk irm irn iro irr irt ita itb itc itf iti itk itm itn ito itt k-t ka- kaa kab kac kaf kai kak kam kan kao kar kat kba kbb kbc kbf kbi kbk kbm kbn kbo kbr kca kcb kcc kci kck kcm kcn kcr kct kfa kfc kff kfi kfm kfo kia kib kic kif kii kik kim kin kio kir kit kkb kkc kki kkk kkm kkn kkr kkt kma kmb kmc kmf kmi kmk kmm kmo kmt kn- kna knc knf kni knk knm knn kno knr knt koa kob koc kof koi kok kom kon koo kor kot kra krc krf kri krk krn kro krr krt kta ktb ktc ktf ktk ktm ktn kto ktr ktt m-f m-o m-r maa mab mac maf mai mak mam man mao mar mat mba mbb mbc mbf mbi mbk mbm mbo mbr mbt mc- mca mcb mcc mcf mci mck mcm mcn mco mcr mct mfa mfb mfc mff mfi mfm mfn mfo mfr mft mi- mia mib mic mif mii mik mim min mio mir mit mka mkb mkc mkk mkm mkn mko mkr mkt mma mmb mmc mmf mmi mmk mmm mmn mmo mmr mmt mna mnb mnc mnf mni mnk mnm mnn mno mnr mnt moa mob moc mof moi mok mom mon moo mor mot mra mrb mrc mrf mri mrk mrm mrn mro mrr mrt mta mtb mtc mtf mti mtk mtm mtn mto mtr mtt n-i naa nab nac naf nai nak nam nan nao nar nat nba nbb nbc nbf nbi nbk nbm nbn nbo nbr nbt nca ncb ncc ncf nci nck ncm ncn nco ncr nct nfa nfb nfc nff nfi nfk nfn nfo nfr nft nia nib nic nif nii nik nim nin nio nir nit nka nkc nkf nki nkk nkm nkn nko nkr nkt nma nmb nmc nmi nmk nmm nmn nmo nmr nmt nna nnb nnc nnf nni nnk nnm nnn nno nnt no- noa nob noc nof noi nok nom non noo nor not nra nrb nrc nrf nri nrk nrm nrn nro nrr nrt nta ntb ntc ntf nti ntk ntm ntn nto ntr ntt o-i oaa oab oac oaf oai oak oam oan oao oar oat ob- oba obb obc obf obi obk obm obn obo obr obt oc- oca ocb occ ocf oci ock ocm ocn oco ocr oct of- ofa ofb ofc off ofi ofm ofn ofo ofr oft oia oib oic oif