-ic a-a a-b a-c a-i aaa aab aac aai aak aam aan aao aar ab- aba abb abc abi abk abm abn abo abr ac- aca acb acc aci ack acm acn aco acr ai- aia aib aic aii aik aim ain aio air aka akb akc aki akk akm akn ako akr ama amb amc ami amk amm amn amo amr an- ana anb anc ani ank anm ann ano anr aoa aob aoc aoi aok aom aon aoo aor ar- ara arb arc ari ark arm arn aro arr baa bab bac bai bak bam ban bao bar bba bbb bbc bbi bbk bbm bbn bbo bbr bca bcb bcc bci bck bcm bcn bco bcr bi- bia bib bic bii bik bim bin bio bir bka bkb bkc bkk bkm bkn bko bkr bma bmb bmc bmi bmk bmm bmn bmo bmr bna bnb bnc bni bnk bnn bno bnr boa bob boc boi bok bom bon boo bor bra brb bri brk brm brn bro brr c-- caa cab cac cai cak cam can cao car cba cbb cbc cbi cbk cbm cbn cbo cbr cca ccb ccc cci cck ccm ccn cco ccr ci- cia cib cic cii cik cim cin cio cir cka ckb ckc cki ckm cko cma cmb cmc cmi cmk cmm cmn cmo cmr cn- cna cnb cnc cni cnm cnn cno cnr co- coa cob coc coi cok com con coo cor cra crb crc cri crk crm crn cro crr ia- iaa iab iac iai iam ian iao iar iba ibb ibc ibi ibk ibm ibn ibo ibr ica icb icc ici ick icm icn ico icr iia iib iic iii iim iin iio iir ika ikb ikc iki ikk iko ikr im- ima imb imc imi imm imn imo in- ina inb inc ini ink inm inn ino inr io- ioa iob ioc ioi iom ion ioo ior ir- ira irb irc iri irk irm irn iro irr ka- kaa kab kac kai kak kam kan kao kar kba kbb kbc kbi kbk kbm kbn kbo kbr kca kcb kcc kci kck kcm kcn kcr kia kib kic kii kik kim kin kio kir kkb kkc kki kkk kkm kkn kkr kma kmb kmc kmi kmk kmm kmo kn- kna knc kni knk knm knn kno knr koa kob koc koi kok kom kon koo kor kra krc kri krk krn kro krr m-o m-r maa mab mac mai mak mam man mao mar mba mbb mbc mbi mbk mbm mbo mbr mc- mca mcb mcc mci mck mcm mcn mco mcr mi- mia mib mic mii mik mim min mio mir mka mkb mkc mkk mkm mkn mko mkr mma mmb mmc mmi mmk mmm mmn mmo mmr mna mnb mnc mni mnk mnm mnn mno mnr moa mob moc moi mok mom mon moo mor mra mrb mrc mri mrk mrm mrn mro mrr n-i naa nab nac nai nak nam nan nao nar nba nbb nbc nbi nbk nbm nbn nbo nbr nca ncb ncc nci nck ncm ncn nco ncr nia nib nic nii nik nim nin nio nir nka nkc nki nkk nkm nkn nko nkr nma nmb nmc nmi nmk nmm nmn nmo nmr nna nnb nnc nni nnk nnm nnn nno no- noa nob noc noi nok nom non noo nor nra nrb nrc nri nrk nrm nrn nro nrr o-i oaa oab oac oai oak oam oan oao oar ob- oba obb obc obi obk obm obn obo obr oc- oca ocb occ oci ock ocm ocn oco ocr oia oib oic oii oik oim oin oio oir oka okb okc oki okk oko okr om- oma omb omc omi omm omn omo omr on- ona onb onc oni onk onn ono onr oo- ooa oob ooc ooi ook oom oon ooo oor or- ora orb orc ori ork orm orn oro orr ra- raa rab rac rai rak ram ran rao rar rba rbb rbc rbi rbk rbm rbn rbo rbr rca rcb rcc rci rcm rcn rco rcr ria rib ric rii rik rim rin rio rir rkb rkc rkk rkm rko rma rmb rmc rmi rmm rmn rmo rmr rna rnb rnc rni rnm rnn rno rnr roa rob roc roi rok rom ron roo ror rra rrb rrc rri rrk rrm rrn rrr