-ic b-u bbb bbc bbe bbi bbk bbo bbu bcb bcc bce bci bck bco bcu bcz be- beb bec bee bei bek beo beu bez bi- bib bic bie bii bik bio biu biz bkb bkc bke bkk bko bob boc boe boi bok boo bou boz bub buc bue bui buk buo buu buz bze bzo bzu bzz c-- cbb cbc cbe cbi cbk cbo cbu cbz ccb ccc cce cci cck cco ccu ccz ce- ceb cec cee cei cek ceo ceu cez ci- cib cic cie cii cik cio ciu ckb ckc cki cko co- cob coc coe coi cok coo cou coz cub cuc cue cui cuk cuo cuu cuz cz- czc cze czk czo ebb ebc ebe ebi ebk ebo ebu ec- ecb ecc ece eci eck eco ecu eeb eec eee eek eeo eib eic eie eii eik eio eiu ekb ekc eke eki eko eku eo- eob eoc eoe eoi eok eoo eou eu- eub euc eue eui eze ezo ezz ibb ibc ibe ibi ibk ibo ibu ibz icb icc ice ici ick ico icu icz ie- iec iee iei iek iib iic iie iii iio iiu ikb ikc ike iki ikk iko iku io- iob ioc ioe ioi ioo iou iu- iub iuc iue iui iuz ize izi izo izu izz k-z kbb kbc kbe kbi kbk kbo kbu kbz kcb kcc kce kci kck kcu ke- keb kec kee kei kek keo kez kib kic kie kii kik kio kiu kiz kkb kkc kke kki kkk kku kob koc koe koi kok koo kou koz kub kuc kue kui kuk kuu kzo o-i ob- obb obc obe obi obk obo obu oc- ocb occ oci ock oco ocu ocz oeb oec oee oei oeo oib oic oie oii oik oio oiu oiz okb okc oke oki okk oko oku oo- oob ooc ooi ook ooo ou- ouc oue oui ouk ouo oze ozo ozu ozz ubb ubc ube ubi ubk ubo ubu ucb ucc uce uci uck uco ucu ueb uec uee uei uib uic uie uii uio uiu ukb ukc uke uki ukk uku ukz uob uoc uoe uok uoo uuc uue uuu uzb uzi uzo uzu zbb zbc zce zco zeb zec zee zek zeo zez zib zie zik zio ziz zo- zob zoc zoe zoi zok zoo zou zub zuc zui zuk zuz zzz