-er b-u bbb bbc bbd bbe bbh bbo bbr bbu bcb bcc bcd bce bch bco bcr bcu bdb bdc bdd bde bdh bdo bdr bdu be- beb bec bed bee beh beo ber beu bhb bhc bhd bhe bhh bho bhr bhu bob boc bod boe boh boo bor bou brb brd bre brh bro brr bru bub buc bud bue buh buo bur buu c-- cbb cbc cbd cbe cbh cbo cbr cbu ccb ccc ccd cce cch cco ccr ccu cdb cdc cdd cde cdh cdo cdr cdu ce- ceb cec ced cee ceh ceo cer ceu ch- chb chc chd che chh cho chr chu co- cob coc cod coe coh coo cor cou crb crc crd cre crh cro crr cru cub cuc cud cue cuh cuo cur cuu dbb dbc dbd dbe dbh dbo dbr dbu dcb dcc dcd dce dco dcr dcu ddb ddc ddd dde ddh ddo ddr ddu de- deb dec ded dee deh deo der deu dh- dhb dhc dhd dhe dhh dho dhr dhu dob doc dod doe doh doo dor dou drb drc drd dre dro drr dru dub duc dud due duh duo dur ebb ebc ebd ebe ebh ebo ebr ebu ec- ecb ecc ecd ece ech eco ecr ecu ed- edb edc edd ede edh edo edr edu eeb eec eed eee eeo eer ehb ehc ehd ehe ehh eho ehr ehu eo- eob eoc eod eoe eoh eoo eor eou erb erc erd ere erh ero err eru eu- eub euc eud eue eur hbb hbc hbd hbe hbh hbo hbr hbu hcb hcc hcd hce hch hco hcr hdb hdc hdd hde hdh hdo hdr hdu he- heb hec hed hee heh heo her heu hhb hhc hhd hhe hhh hho hhr hhu hob hoc hod hoe hoh hoo hor hou hr- hrb hrc hrd hre hrh hro hrr hru hub huc hud hue huh huo hur huu ob- obb obc obd obe obh obo obr obu oc- ocb occ ocd och oco ocr ocu odb odc odd ode odh odo odr odu oeb oec oed oee oeh oeo oer ohc ohd ohe ohh oho ohr ohu oo- oob ooc ood ooh ooo oor or- orb orc ord ore orh oro orr oru ou- ouc oud oue ouh ouo our rbb rbc rbd rbe rbh rbo rbr rbu rcb rcc rcd rce rch rco rcr rcu rdb rdc rdd rde rdh rdo rdr rdu re- reb rec red ree reh reo rer reu rh- rhb rhc rhd rhe rhh rho rhr rhu rob roc rod roe roh roo ror rou rrb rrc rrd rrh rrr rru rub ruc rud rue ruh ruo rur ruu ubb ubc ube ubh ubo ubr ubu ucb ucc ucd uce uch uco ucr ucu udb udc udd ude udo udr udu ueb uec ued uee ueh uer uhb uhc uhd uhe uhh uho uhr uhu uob uoc uod uoe uoo uor ur- urb urc urd ure uro urr uru uuc uue uur uuu