-ic b-u bbb bbc bbd bbi bbk bbn bbu bcb bcc bcd bci bck bcn bcu bdb bdc bdd bdi bdk bdu bi- bib bic bid bii bik bin biu bkb bkc bkk bkn bnb bnc bnd bni bnk bnn bnu bub buc bud bui buk bun buu c-- cbb cbc cbd cbi cbk cbn cbu ccb ccc ccd cci cck ccn ccu cdb cdc cdd cdi cdk cdn cdu ci- cib cic cid cii cik cin ciu ckb ckc ckd cki cn- cnb cnc cnd cni cnn cnu cub cuc cud cui cuk cun cuu dbb dbc dbd dbi dbk dbn dbu dcb dcc dcd dci dck dcn dcu ddb ddc ddd ddi ddk ddn ddu di- dib dic did dii dik din diu dkb dkc dki dkk dku dnb dnc dnd dni dnk dnn dub duc dud dui duk dun i-d ibb ibc ibd ibi ibk ibn ibu icb icc icd ici ick icn icu idb idc idd idi idk idn idu iib iic iid iii iin iiu ikb ikc iki ikk iku in- inb inc ind ini ink inn inu iu- iub iuc iud iui kbb kbc kbd kbi kbk kbn kbu kcb kcc kcd kci kck kcn kcu kdb kdc kdk kdu kib kic kid kii kik kin kiu kkb kkc kki kkk kkn kku kn- knc knd kni knk knn knu kub kuc kud kui kuk kun kuu n-i nbb nbc nbd nbi nbk nbn nbu ncb ncc ncd nci nck ncn ncu ndb ndc ndd ndi ndk ndn ndu nib nic nid nii nik nin niu nkc nki nkk nkn nku nnb nnc nni nnk nnn nnu nub nuc nud nui nuk nun nuu ubb ubc ubi ubk ubn ubu ucb ucc ucd uci uck ucn ucu udb udc udd udi udk udn udu uib uic uid uii uin uiu ukb ukc uki ukk ukn uku un- unb unc und uni unk unn unu uuc uun uuu