-ic b-u bbb bbc bbe bbi bbk bbu bcb bcc bce bci bck bcu be- beb bec bee bei bek beu bi- bib bic bie bii bik biu bkb bkc bke bkk bub buc bue bui buk buu c-- cbb cbc cbe cbi cbk cbu ccb ccc cce cci cck ccu ce- ceb cec cee cei cek ceu ci- cib cic cie cii cik ciu ckb ckc cki cub cuc cue cui cuk cuu ebb ebc ebe ebi ebk ebu ec- ecb ecc ece eci eck ecu eeb eec eee eek eib eic eie eii eik eiu ekb ekc eke eki eku eu- eub euc eue eui ibb ibc ibe ibi ibk ibu icb icc ice ici ick icu ie- iec iee iei iek iib iic iie iii iiu ikb ikc ike iki ikk iku iu- iub iuc iue iui kbb kbc kbe kbi kbk kbu kcb kcc kce kci kck kcu ke- keb kec kee kei kek kib kic kie kii kik kiu kkb kkc kke kki kkk kku kub kuc kue kui kuk kuu ubb ubc ube ubi ubk ubu ucb ucc uce uci uck ucu ueb uec uee uei uib uic uie uii uiu ukb ukc uke uki ukk uku uuc uue uuu