-ic a-a a-b a-c a-i a-t aaa aab aac aai aak aat ab- aba abb abc abi abk abt ac- aca acb acc aci ack act ai- aia aib aic aii aik ait aka akb akc aki akk at- ata atb atc ati att baa bab bac bai bak bat bba bbb bbc bbi bbk bbt bca bcb bcc bci bck bct bi- bia bib bic bii bik bit bka bkb bkc bkk bkt bta btb btc bti btk btt c-- caa cab cac cai cak cat cba cbb cbc cbi cbk cbt cca ccb ccc cci cck cct ci- cia cib cic cii cik cit cka ckb ckc cki ckt cta ctb ctc cti ctk ctt ia- iaa iab iac iai iat iba ibb ibc ibi ibk ibt ica icb icc ici ick ict iia iib iic iii iit ika ikb ikc iki ikk ikt ita itb itc iti itk itt k-t ka- kaa kab kac kai kak kat kba kbb kbc kbi kbk kca kcb kcc kci kck kct kia kib kic kii kik kit kkb kkc kki kkk kkt kta ktb ktc ktk ktt taa tab tac tai tak tat tba tbb tbc tbi tbk tbt tca tcb tcc tci tck tct tia tib tic tii tik tit tka tkb tkc tkk tkt tta ttb ttc tti ttk ttt