-er -th b-u bbb bbc bbe bbh bbr bbt bbu bcb bcc bce bch bcr bct bcu be- beb bec bee beh ber bet beu bhb bhc bhe bhh bhr bht bhu brb bre brh brr brt bru btb btc bte bth btr btt btu bub buc bue buh bur but buu c-- cbb cbc cbe cbh cbr cbt cbu ccb ccc cce cch ccr cct ccu ce- ceb cec cee ceh cer cet ceu ch- chb chc che chh chr cht chu crb crc cre crh crr crt cru ctb ctc cte cth ctr ctt ctu cub cuc cue cuh cur cut cuu ebb ebc ebe ebh ebr ebt ebu ec- ecb ecc ece ech ecr ect ecu eeb eec eee eer eet ehb ehc ehe ehh ehr eht ehu erb erc ere erh err ert eru etb etc ete eth etr ett etu eu- eub euc eue eur eut hbb hbc hbe hbh hbr hbt hbu hcb hcc hce hch hcr hct he- heb hec hee heh her het heu hhb hhc hhe hhh hhr hht hhu hr- hrb hrc hre hrh hrr hrt hru htb htc hte hth htr htt hub huc hue huh hur hut huu rbb rbc rbe rbh rbr rbt rbu rcb rcc rce rch rcr rct rcu re- reb rec ree reh rer ret reu rh- rhb rhc rhe rhh rhr rht rhu rrb rrc rrh rrr rrt rru rtb rtc rte rtr rtt rtu rub ruc rue ruh rur rut ruu tbb tbc tbe tbh tbr tbt tbu tcb tcc tce tch tcr tct tcu te- teb tec tee teh ter tet teu th- thb thc the thh thr tht thu trb trc tre trh trr trt tru ttb ttc tte tth ttr ttt ttu tub tuc tue tuh tur tut tuu ubb ubc ube ubh ubr ubt ubu ucb ucc uce uch ucr uct ucu ueb uec uee ueh uer uet uhb uhc uhe uhh uhr uht uhu ur- urb urc ure urr urt uru utb utc ute uth utr utt utu uuc uue uur uut uuu