-ic b-u bbb bbc bbi bbk bbn bbo bbt bbu bcb bcc bci bck bcn bco bct bcu bi- bib bic bii bik bin bio bit biu bkb bkc bkk bkn bko bkt bnb bnc bni bnk bnn bno bnt bnu bob boc boi bok bon boo bot bou btb btc bti btk btn bto btt btu bub buc bui buk bun buo but buu c-- cbb cbc cbi cbk cbn cbo cbt cbu ccb ccc cci cck ccn cco cct ccu ci- cib cic cii cik cin cio cit ciu ckb ckc cki cko ckt cn- cnb cnc cni cnn cno cnt cnu co- cob coc coi cok con coo cot cou ctb ctc cti ctk ctn cto ctt ctu cub cuc cui cuk cun cuo cut cuu ibb ibc ibi ibk ibn ibo ibt ibu icb icc ici ick icn ico ict icu iib iic iii iin iio iit iiu ikb ikc iki ikk iko ikt iku in- inb inc ini ink inn ino int inu io- iob ioc ioi ion ioo iot iou itb itc iti itk itn ito itt itu iu- iub iuc iui iut k-t kbb kbc kbi kbk kbn kbo kbu kcb kcc kci kck kcn kct kcu kib kic kii kik kin kio kit kiu kkb kkc kki kkk kkn kkt kku kn- knc kni knk knn kno knt knu kob koc koi kok kon koo kot kou ktb ktc ktk ktn kto ktt ktu kub kuc kui kuk kun kut kuu n-i nbb nbc nbi nbk nbn nbo nbt nbu ncb ncc nci nck ncn nco nct ncu nib nic nii nik nin nio nit niu nkc nki nkk nkn nko nkt nku nnb nnc nni nnk nnn nno nnt nnu no- nob noc noi nok non noo not nou ntb ntc nti ntk ntn nto ntt ntu nub nuc nui nuk nun nuo nut nuu o-i ob- obb obc obi obk obn obo obt obu oc- ocb occ oci ock ocn oco oct ocu oib oic oii oik oin oio oit oiu okb okc oki okk oko oku on- onb onc oni onk onn ono ont onu oo- oob ooc ooi ook oon ooo oot ot- otb otc oti otk otn oto ott otu ou- ouc oui ouk oun ouo out tbb tbc tbi tbk tbn tbo tbt tbu tcb tcc tci tck tcn tco tct tcu tib tic tii tik tin tio tit tiu tkb tkc tkk tko tkt tnb tnc tni tnk tnn tno tnt to- tob toc toi tok ton too tot tou ttb ttc tti ttk ttn tto ttt ttu tub tuc tui tuk tun tuo tut tuu ubb ubc ubi ubk ubn ubo ubt ubu ucb ucc uci uck ucn uco uct ucu uib uic uii uin uio uit uiu ukb ukc uki ukk ukn uku un- unb unc uni unk unn uno unt unu uob uoc uok uon uoo uot utb utc uti utk utn uto utt utu uuc uun uut uuu