-er b-u bbb bbe bbg bbi bbo bbr bbs bbu be- beb bee beg bei beo ber bes beu bgb bge bgg bgi bgo bgr bgs bgu bi- bib bie big bii bio bir bis biu bob boe bog boi boo bor bos bou brb bre brg bri bro brr brs bru bsb bse bsg bsi bso bsr bss bsu bub bue bug bui buo bur bus buu ebb ebe ebg ebi ebo ebr ebs ebu eeb eee eeg eeo eer ees egb ege egg egi ego egr egs egu eib eie eig eii eio eir eis eiu eo- eob eoe eog eoi eoo eor eos eou erb ere erg eri ero err ers eru es- esb ese esg esi eso esr ess esu eu- eub eue eug eui eur eus gbe gbg gbi gbo gbr gbs gbu ge- geb gee geg gei geo ger ges geu ggb ggg ggi ggo ggr ggs ggu gib gie gig gii gio gir gis giu gob goe gog goi goo gor gos gou grb gre grg gri gro grr grs gru gsb gse gsg gsi gso gsr gss gsu gu- gub gue gug gui guo gur gus guu ibb ibe ibg ibi ibo ibr ibs ibu ie- iee ieg iei ier ies igb ige igg igi igo igr igs igu iib iie iii iio iir iis iiu io- iob ioe iog ioi ioo ior ios iou ir- irb ire irg iri iro irr irs iru is- isb ise isg isi iso isr iss isu iu- iub iue iug iui iur ius o-i ob- obb obe obg obi obo obr obs obu oeb oee oeg oei oeo oer oes oge ogg ogi ogo ogs oib oie oii oio oir ois oiu oo- oob oog ooi ooo oor oos or- orb ore org ori oro orr ors oru os- osb ose osg osi oso osr oss osu ou- oue oui ouo our ous rbb rbe rbg rbi rbo rbr rbs rbu re- reb ree reg rei reo rer res reu rgb rge rgg rgi rgo rgr rgs rib rie rig rii rio rir ris rob roe rog roi roo ror ros rou rrb rrg rri rrr rrs rru rsb rse rsg rsi rso rsr rss rsu rub rue rug rui ruo rur rus ruu sbb sbe sbg sbi sbo sbr sbs sbu se- seb see seg sei seo ser ses seu sgb sge sgg sgi sgo sgr sgs sgu sib sie sig sii sio sir sis siu sob soe sog soi soo sor sos sou sr- srb sre srg sri sro srr srs ss- ssb sse ssg ssi sso ssr sss ssu sub sue sug sui suo sur sus suu ubb ube ubg ubi ubo ubr ubs ubu ueb uee ueg uei uer ues ugb uge ugg ugi ugo ugr ugs ugu uib uie uig uii uio uir uis uiu uob uoe uog uoo uor uos ur- urb ure urg uri uro urr urs uru usb use usg usi uso usr uss usu uue uug uur uus uuu