-er b-u bbb bbc bbd bbe bbh bbo bbr bbs bbu bcb bcc bcd bce bch bco bcr bcs bcu bdb bdc bdd bde bdh bdo bdr bds bdu be- beb bec bed bee beh beo ber bes beu bhb bhc bhd bhe bhh bho bhr bhs bhu bob boc bod boe boh boo bor bos bou brb brd bre brh bro brr brs bru bsb bsc bsd bse bsh bso bsr bss bsu bub buc bud bue buh buo bur bus buu c-- cbb cbc cbd cbe cbh cbo cbr cbs cbu ccb ccc ccd cce cch cco ccr ccs ccu cdb cdc cdd cde cdh cdo cdr cds cdu ce- ceb cec ced cee ceh ceo cer ces ceu ch- chb chc chd che chh cho chr chs chu co- cob coc cod coe coh coo cor cos cou crb crc crd cre crh cro crr crs cru csb csc csd cse csh cso csr css csu cub cuc cud cue cuh cuo cur cus cuu dbb dbc dbd dbe dbh dbo dbr dbs dbu dcb dcc dcd dce dco dcr dcs dcu ddb ddc ddd dde ddh ddo ddr dds ddu de- deb dec ded dee deh deo der des deu dh- dhb dhc dhd dhe dhh dho dhr dhs dhu dob doc dod doe doh doo dor dos dou drb drc drd dre dro drr drs dru dsb dsc dsd dse dsh dso dsr dss dsu dub duc dud due duh duo dur dus ebb ebc ebd ebe ebh ebo ebr ebs ebu ec- ecb ecc ecd ece ech eco ecr ecs ecu ed- edb edc edd ede edh edo edr eds edu eeb eec eed eee eeo eer ees ehb ehc ehd ehe ehh eho ehr ehs ehu eo- eob eoc eod eoe eoh eoo eor eos eou erb erc erd ere erh ero err ers eru es- esb esc esd ese esh eso esr ess esu eu- eub euc eud eue eur eus hbb hbc hbd hbe hbh hbo hbr hbs hbu hcb hcc hcd hce hch hco hcr hcs hdb hdc hdd hde hdh hdo hdr hds hdu he- heb hec hed hee heh heo her hes heu hhb hhc hhd hhe hhh hho hhr hhs hhu hob hoc hod hoe hoh hoo hor hos hou hr- hrb hrc hrd hre hrh hro hrr hrs hru hsb hsc hsd hse hsh hsr hss hsu hub huc hud hue huh huo hur hus huu ob- obb obc obd obe obh obo obr obs obu oc- ocb occ ocd och oco ocr ocs ocu odb odc odd ode odh odo odr ods odu oeb oec oed oee oeh oeo oer oes ohc ohd ohe ohh oho ohr ohs ohu oo- oob ooc ood ooh ooo oor oos or- orb orc ord ore orh oro orr ors oru os- osb osc osd ose osh oso osr oss osu ou- ouc oud oue ouh ouo our ous rbb rbc rbd rbe rbh rbo rbr rbs rbu rcb rcc rcd rce rch rco rcr rcs rcu rdb rdc rdd rde rdh rdo rdr rds rdu re- reb rec red ree reh reo rer res reu rh- rhb rhc rhd rhe rhh rho rhr rhs rhu rob roc rod roe roh roo ror ros rou rrb rrc rrd rrh rrr rrs rru rsb rsc rsd rse rsh rso rsr rss rsu rub ruc rud rue ruh ruo rur rus ruu sbb sbc sbd sbe sbh sbo sbr sbs sbu scb scc scd sce sch sco scr scs scu sdb sdc sdd sde sdh sdo sdr sds sdu se- seb sec sed see seh seo ser ses seu sh- shb shc shd she shh sho shr shs shu sob soc sod soe soh soo sor sos sou sr- srb src srd sre srh sro srr srs ss- ssb ssc ssd sse ssh sso ssr sss ssu sub suc sud sue suh suo sur sus suu ubb ubc ube ubh ubo ubr ubs ubu ucb ucc ucd uce uch uco ucr ucs ucu udb udc udd ude udo udr uds udu ueb uec ued uee ueh uer ues uhb uhc uhd uhe uhh uho uhr uhs uhu uob uoc uod uoe uoo uor uos ur- urb urc urd ure uro urr urs uru usb usc usd use ush uso usr uss usu uuc uue uur uus uuu