-ic b-u bbb bbc bbi bbm bbn bbo bbt bbu bcb bcc bci bcm bcn bco bct bcu bi- bib bic bii bim bin bio bit biu bmb bmc bmi bmm bmn bmo bmt bmu bnb bnc bni bnn bno bnt bnu bob boc boi bom bon boo bot bou btb btc bti btm btn bto btt btu bub buc bui bum bun buo but buu c-- cbb cbc cbi cbm cbn cbo cbt cbu ccb ccc cci ccm ccn cco cct ccu ci- cib cic cii cim cin cio cit ciu cmb cmc cmi cmm cmn cmo cmt cmu cn- cnb cnc cni cnm cnn cno cnt cnu co- cob coc coi com con coo cot cou ctb ctc cti ctm ctn cto ctt ctu cub cuc cui cum cun cuo cut cuu ibb ibc ibi ibm ibn ibo ibt ibu icb icc ici icm icn ico ict icu iib iic iii iim iin iio iit iiu im- imb imc imi imm imn imo imt imu in- inb inc ini inm inn ino int inu io- iob ioc ioi iom ion ioo iot iou itb itc iti itm itn ito itt itu iu- iub iuc iui ium iut m-o mbb mbc mbi mbm mbo mbt mbu mc- mcb mcc mci mcm mcn mco mct mcu mi- mib mic mii mim min mio mit miu mmb mmc mmi mmm mmn mmo mmt mmu mnb mnc mni mnm mnn mno mnt mnu mob moc moi mom mon moo mot mou mtb mtc mti mtm mtn mto mtt mtu mub muc mui mum mun mut muu n-i nbb nbc nbi nbm nbn nbo nbt nbu ncb ncc nci ncm ncn nco nct ncu nib nic nii nim nin nio nit niu nmb nmc nmi nmm nmn nmo nmt nmu nnb nnc nni nnm nnn nno nnt nnu no- nob noc noi nom non noo not nou ntb ntc nti ntm ntn nto ntt ntu nub nuc nui num nun nuo nut nuu o-i ob- obb obc obi obm obn obo obt obu oc- ocb occ oci ocm ocn oco oct ocu oib oic oii oim oin oio oit oiu om- omb omc omi omm omn omo omt omu on- onb onc oni onn ono ont onu oo- oob ooc ooi oom oon ooo oot ot- otb otc oti otm otn oto ott otu ou- ouc oui oum oun ouo out tbb tbc tbi tbm tbn tbo tbt tbu tcb tcc tci tcm tcn tco tct tcu tib tic tii tim tin tio tit tiu tmb tmc tmi tmm tmn tmo tmt tmu tnb tnc tni tnm tnn tno tnt to- tob toc toi tom ton too tot tou ttb ttc tti ttm ttn tto ttt ttu tub tuc tui tum tun tuo tut tuu ubb ubc ubi ubn ubo ubt ubu ucb ucc uci ucm ucn uco uct ucu uib uic uii uim uin uio uit uiu um- umb umc umi umm umn umo umt umu un- unb unc uni unm unn uno unt unu uob uoc uom uon uoo uot utb utc uti utm utn uto utt utu uuc uum uun uut uuu