-ic a-a a-b a-c a-i a-t aaa aab aac aai aak aan aao aas aat ab- aba abb abc abi abk abn abo abs abt ac- aca acb acc aci ack acn aco acs act ai- aia aib aic aii aik ain aio ais ait aka akb akc aki akk akn ako aks an- ana anb anc ani ank ann ano ans ant aoa aob aoc aoi aok aon aoo aos aot as- asa asb asc asi ask asn aso ass ast at- ata atb atc ati atn ato ats att baa bab bac bai bak ban bao bas bat bba bbb bbc bbi bbk bbn bbo bbs bbt bca bcb bcc bci bck bcn bco bcs bct bi- bia bib bic bii bik bin bio bis bit bka bkb bkc bkk bkn bko bks bkt bna bnb bnc bni bnk bnn bno bns bnt boa bob boc boi bok bon boo bos bot bsa bsb bsc bsi bsk bsn bso bss bst bta btb btc bti btk btn bto bts btt c-- caa cab cac cai cak can cao cas cat cba cbb cbc cbi cbk cbn cbo cbs cbt cca ccb ccc cci cck ccn cco ccs cct ci- cia cib cic cii cik cin cio cis cit cka ckb ckc cki cko cks ckt cn- cna cnb cnc cni cnn cno cns cnt co- coa cob coc coi cok con coo cos cot csa csb csc csi csk csn cso css cst cta ctb ctc cti ctk ctn cto cts ctt ia- iaa iab iac iai ian iao ias iat iba ibb ibc ibi ibk ibn ibo ibs ibt ica icb icc ici ick icn ico ics ict iia iib iic iii iin iio iis iit ika ikb ikc iki ikk iko iks ikt in- ina inb inc ini ink inn ino ins int io- ioa iob ioc ioi ion ioo ios iot is- isa isb isc isi isk isn iso iss ist ita itb itc iti itk itn ito its itt k-t ka- kaa kab kac kai kak kan kao kas kat kba kbb kbc kbi kbk kbn kbo kbs kca kcb kcc kci kck kcn kcs kct kia kib kic kii kik kin kio kis kit kkb kkc kki kkk kkn kks kkt kn- kna knc kni knk knn kno knt koa kob koc koi kok kon koo kos kot ksa ksb ksc ksi ksk ksn kso kss kst kta ktb ktc ktk ktn kto kts ktt n-i naa nab nac nai nak nan nao nas nat nba nbb nbc nbi nbk nbn nbo nbs nbt nca ncb ncc nci nck ncn nco ncs nct nia nib nic nii nik nin nio nis nit nka nkc nki nkk nkn nko nks nkt nna nnb nnc nni nnk nnn nno nns nnt no- noa nob noc noi nok non noo nos not nsa nsb nsc nsi nsk nsn nso nss nst nta ntb ntc nti ntk ntn nto nts ntt o-i oaa oab oac oai oak oan oao oas oat ob- oba obb obc obi obk obn obo obs obt oc- oca ocb occ oci ock ocn oco ocs oct oia oib oic oii oik oin oio ois oit oka okb okc oki okk oko oks on- ona onb onc oni onk onn ono ons ont oo- ooa oob ooc ooi ook oon ooo oos oot os- osa osb osc osi osk osn oso oss ost ot- ota otb otc oti otk otn oto ots ott saa sab sac sai sak san sao sas sat sba sbb sbc sbi sbk sbn sbo sbs sbt sca scb scc sci sck scn sco scs sct sia sib sic sii sik sin sio sis sit sk- ska skb skc ski skk sko sks skt sna snb snc sni snk snn sno sns snt soa sob soc soi sok son soo sos sot ss- ssa ssb ssc ssi ssk ssn sso sss sst sta stb stc sti stk stn sto sts stt taa tab tac tai tak tan tao tas tat tba tbb tbc tbi tbk tbn tbo tbs tbt tca tcb tcc tci tck tcn tco tcs tct tia tib tic tii tik tin tio tis tit tka tkb tkc tkk tko tks tkt tna tnb tnc tni tnk tnn tno tns tnt to- toa tob toc toi tok ton too tos tot tsa tsb tsc tsi tsk tsn tso tss tst tta ttb ttc tti ttk ttn tto tts ttt