-er -th b-u bbb bbc bbd bbe bbh bbr bbt bbu bcb bcc bcd bce bch bcr bct bcu bdb bdc bdd bde bdh bdr bdt bdu be- beb bec bed bee beh ber bet beu bhb bhc bhd bhe bhh bhr bht bhu brb brd bre brh brr brt bru btb btc btd bte bth btr btt btu bub buc bud bue buh bur but buu c-- cbb cbc cbd cbe cbh cbr cbt cbu ccb ccc ccd cce cch ccr cct ccu cdb cdc cdd cde cdh cdr cdt cdu ce- ceb cec ced cee ceh cer cet ceu ch- chb chc chd che chh chr cht chu crb crc crd cre crh crr crt cru ctb ctc ctd cte cth ctr ctt ctu cub cuc cud cue cuh cur cut cuu dbb dbc dbd dbe dbh dbr dbt dbu dcb dcc dcd dce dcr dct dcu ddb ddc ddd dde ddh ddr ddt ddu de- deb dec ded dee deh der det deu dh- dhb dhc dhd dhe dhh dhr dht dhu drb drc drd dre drr drt dru dtb dtc dtd dte dth dtr dtt dtu dub duc dud due duh dur dut ebb ebc ebd ebe ebh ebr ebt ebu ec- ecb ecc ecd ece ech ecr ect ecu ed- edb edc edd ede edh edr edt edu eeb eec eed eee eer eet ehb ehc ehd ehe ehh ehr eht ehu erb erc erd ere erh err ert eru etb etc etd ete eth etr ett etu eu- eub euc eud eue eur eut hbb hbc hbd hbe hbh hbr hbt hbu hcb hcc hcd hce hch hcr hct hdb hdc hdd hde hdh hdr hdt hdu he- heb hec hed hee heh her het heu hhb hhc hhd hhe hhh hhr hht hhu hr- hrb hrc hrd hre hrh hrr hrt hru htb htc htd hte hth htr htt hub huc hud hue huh hur hut huu rbb rbc rbd rbe rbh rbr rbt rbu rcb rcc rcd rce rch rcr rct rcu rdb rdc rdd rde rdh rdr rdt rdu re- reb rec red ree reh rer ret reu rh- rhb rhc rhd rhe rhh rhr rht rhu rrb rrc rrd rrh rrr rrt rru rtb rtc rtd rte rtr rtt rtu rub ruc rud rue ruh rur rut ruu tbb tbc tbd tbe tbh tbr tbt tbu tcb tcc tcd tce tch tcr tct tcu tdb tdc tdd tde tdh tdr tdt tdu te- teb tec ted tee teh ter tet teu th- thb thc thd the thh thr tht thu trb trc trd tre trh trr trt tru ttb ttc ttd tte tth ttr ttt ttu tub tuc tud tue tuh tur tut tuu ubb ubc ube ubh ubr ubt ubu ucb ucc ucd uce uch ucr uct ucu udb udc udd ude udr udt udu ueb uec ued uee ueh uer uet uhb uhc uhd uhe uhh uhr uht uhu ur- urb urc urd ure urr urt uru utb utc utd ute uth utr utt utu uuc uue uur uut uuu