-ic a-a a-b a-c a-i a-t aaa aab aac aai aak aas aat aau ab- aba abb abc abi abk abs abt abu ac- aca acb acc aci ack acs act acu ai- aia aib aic aii aik ais ait aiu aka akb akc aki akk aks aku as- asa asb asc asi ask ass ast asu at- ata atb atc ati ats att atu au- aua aub auc aui auk aus aut b-u baa bab bac bai bak bas bat bau bba bbb bbc bbi bbk bbs bbt bbu bca bcb bcc bci bck bcs bct bcu bi- bia bib bic bii bik bis bit biu bka bkb bkc bkk bks bkt bsa bsb bsc bsi bsk bss bst bsu bta btb btc bti btk bts btt btu bua bub buc bui buk bus but buu c-- caa cab cac cai cak cas cat cau cba cbb cbc cbi cbk cbs cbt cbu cca ccb ccc cci cck ccs cct ccu ci- cia cib cic cii cik cis cit ciu cka ckb ckc cki cks ckt csa csb csc csi csk css cst csu cta ctb ctc cti ctk cts ctt ctu cua cub cuc cui cuk cus cut cuu ia- iaa iab iac iai ias iat iau iba ibb ibc ibi ibk ibs ibt ibu ica icb icc ici ick ics ict icu iia iib iic iii iis iit iiu ika ikb ikc iki ikk iks ikt iku is- isa isb isc isi isk iss ist isu ita itb itc iti itk its itt itu iu- iua iub iuc iui ius iut k-t ka- kaa kab kac kai kak kas kat kau kba kbb kbc kbi kbk kbs kbu kca kcb kcc kci kck kcs kct kcu kia kib kic kii kik kis kit kiu kkb kkc kki kkk kks kkt kku ksa ksb ksc ksi ksk kss kst ksu kta ktb ktc ktk kts ktt ktu kub kuc kui kuk kus kut kuu saa sab sac sai sak sas sat sau sba sbb sbc sbi sbk sbs sbt sbu sca scb scc sci sck scs sct scu sia sib sic sii sik sis sit siu sk- ska skb skc ski skk sks skt sku ss- ssa ssb ssc ssi ssk sss sst ssu sta stb stc sti stk sts stt stu sua sub suc sui suk sus sut suu taa tab tac tai tak tas tat tau tba tbb tbc tbi tbk tbs tbt tbu tca tcb tcc tci tck tcs tct tcu tia tib tic tii tik tis tit tiu tka tkb tkc tkk tks tkt tsa tsb tsc tsi tsk tss tst tsu tta ttb ttc tti ttk tts ttt ttu tua tub tuc tui tuk tus tut tuu ua- uaa uab uac uai uak uas uat uau uba ubb ubc ubi ubk ubs ubt ubu uca ucb ucc uci uck ucs uct ucu uia uib uic uii uis uit uiu uka ukb ukc uki ukk uku usa usb usc usi usk uss ust usu uta utb utc uti utk uts utt utu uua uuc uus uut uuu