-er bbb bbc bbe bbg bbh bbo bbr bbs bcb bcc bce bcg bch bco bcr bcs bcz be- beb bec bee beg beh beo ber bes bez bgb bgc bge bgg bgh bgo bgr bgs bgz bhb bhc bhe bhg bhh bho bhr bhs bob boc boe bog boh boo bor bos boz brb bre brg brh bro brr brs brz bsb bsc bse bsg bsh bso bsr bss bze bzh bzo bzr bzs bzz c-- cbb cbc cbe cbg cbh cbo cbr cbs cbz ccb ccc cce ccg cch cco ccr ccs ccz ce- ceb cec cee ceg ceh ceo cer ces cez cgb cgc cge cgg cgh cgo cgr cgs ch- chb chc che chg chh cho chr chs chz co- cob coc coe cog coh coo cor cos coz crb crc cre crg crh cro crr crs crz csb csc cse csg csh cso csr css csz cz- czc cze czo ebb ebc ebe ebg ebh ebo ebr ebs ec- ecb ecc ece ecg ech eco ecr ecs eeb eec eee eeg eeo eer ees egb egc ege egg egh ego egr egs ehb ehc ehe ehg ehh eho ehr ehs eo- eob eoc eoe eog eoh eoo eor eos erb erc ere erg erh ero err ers erz es- esb esc ese esg esh eso esr ess eze ezh ezo ezr ezs ezz gbc gbe gbg gbh gbo gbr gbs gbz gcb gcc gce gcg gch gco gcr gcs ge- geb gec gee geg geh geo ger ges gez ggb ggc ggg ggh ggo ggr ggs ggz ghb ghc ghe ghg ghh gho ghr ghs ghz gob goc goe gog goh goo gor gos goz grb grc gre grg grh gro grr grs gsb gsc gse gsg gso gsr gss gzo gzr hbb hbc hbe hbg hbh hbo hbr hbs hbz hcb hcc hce hcg hch hco hcr hcs he- heb hec hee heg heh heo her hes hez hgb hgc hge hgg hgh hgo hgr hgs hhb hhc hhe hhg hhh hho hhr hhs hhz hob hoc hoe hog hoh hoo hor hos hr- hrb hrc hre hrg hrh hro hrr hrs hrz hsb hsc hse hsg hsh hsr hss hsz hze hzo hzs ob- obb obc obe obg obh obo obr obs oc- ocb occ ocg och oco ocr ocs ocz oeb oec oee oeg oeh oeo oer oes ogc oge ogg ogh ogo ogs ohc ohe ohg ohh oho ohr ohs oo- oob ooc oog ooh ooo oor oos or- orb orc ore org orh oro orr ors orz os- osb osc ose osg osh oso osr oss oze ozo ozs ozz rbb rbc rbe rbg rbh rbo rbr rbs rcb rcc rce rcg rch rco rcr rcs re- reb rec ree reg reh reo rer res rez rgb rgc rge rgg rgh rgo rgr rgs rh- rhb rhc rhe rhg rhh rho rhr rhs rob roc roe rog roh roo ror ros roz rrb rrc rrg rrh rrr rrs rsb rsc rse rsg rsh rso rsr rss rzb rze rzo sbb sbc sbe sbg sbh sbo sbr sbs scb scc sce scg sch sco scr scs se- seb sec see seg seh seo ser ses sez sgb sgc sge sgg sgh sgo sgr sgs sh- shb shc she shg shh sho shr shs sob soc soe sog soh soo sor sos soz sr- srb src sre srg srh sro srr srs ss- ssb ssc sse ssg ssh sso ssr sss ssz sze szr z-g zbb zbc zbr zbs zce zco zcs zeb zec zee zeh zeo zer zes zez zgb zgg zgs zhc zhe zho zhr zhs zo- zob zoc zoe zog zoo zor zos zrh zro zrs zse zsg zsh zsz zzr zzs zzz