-ic b-u bbb bbc bbe bbi bbn bbo bbu bcb bcc bce bci bcn bco bcu bcz be- beb bec bee bei ben beo beu bez bi- bib bic bie bii bin bio biu biz bnb bnc bne bni bnn bno bnu bnz bob boc boe boi bon boo bou boz bub buc bue bui bun buo buu buz bze bzn bzo bzu bzz c-- cbb cbc cbe cbi cbn cbo cbu cbz ccb ccc cce cci ccn cco ccu ccz ce- ceb cec cee cei cen ceo ceu cez ci- cib cic cie cii cin cio ciu cn- cnb cnc cne cni cnn cno cnu co- cob coc coe coi con coo cou coz cub cuc cue cui cun cuo cuu cuz cz- czc cze czo ebb ebc ebe ebi ebn ebo ebu ec- ecb ecc ece eci ecn eco ecu eeb eec eee een eeo eib eic eie eii ein eio eiu en- enb enc ene eni enn eno enu enz eo- eob eoc eoe eoi eon eoo eou eu- eub euc eue eui eun eze ezo ezz ibb ibc ibe ibi ibn ibo ibu ibz icb icc ice ici icn ico icu icz ie- iec iee iei ien iib iic iie iii iin iio iiu in- inb inc ine ini inn ino inu io- iob ioc ioe ioi ion ioo iou iu- iub iuc iue iui iuz ize izi izo izu izz n-i nbb nbc nbe nbi nbn nbo nbu ncb ncc nce nci ncn nco ncu ne- neb nec nee nei nen neo neu nez nib nic nie nii nin nio niu niz nnb nnc nne nni nnn nno nnu nnz no- nob noc noe noi non noo nou noz nub nuc nue nui nun nuo nuu nzb nze nzi nzo nzz o-i ob- obb obc obe obi obn obo obu oc- ocb occ oci ocn oco ocu ocz oeb oec oee oei oen oeo oib oic oie oii oin oio oiu oiz on- onb onc one oni onn ono onu oo- oob ooc ooi oon ooo ou- ouc oue oui oun ouo oze ozo ozu ozz ubb ubc ube ubi ubn ubo ubu ucb ucc uce uci ucn uco ucu ueb uec uee uei uen uib uic uie uii uin uio uiu un- unb unc une uni unn uno unu uob uoc uoe uon uoo uuc uue uun uuu uzb uzi uzo uzu zbb zbc zce zco zeb zec zee zen zeo zez zib zie zin zio ziz znc zne znn zno zo- zob zoc zoe zoi zon zoo zou zub zuc zui zun zuz zzz