-er -th bbb bbc bbe bbh bbn bbr bbt bcb bcc bce bch bcn bcr bct be- beb bec bee beh ben ber bet bhb bhc bhe bhh bhr bht bnb bnc bne bnn bnr bnt brb bre brh brn brr brt btb btc bte bth btn btr btt c-- cbb cbc cbe cbh cbn cbr cbt ccb ccc cce cch ccn ccr cct ce- ceb cec cee ceh cen cer cet ch- chb chc che chh chn chr cht cn- cnb cnc cne cnh cnn cnr cnt crb crc cre crh crn crr crt ctb ctc cte cth ctn ctr ctt ebb ebc ebe ebh ebn ebr ebt ec- ecb ecc ece ech ecn ecr ect eeb eec eee een eer eet ehb ehc ehe ehh ehn ehr eht en- enb enc ene enh enn enr ent erb erc ere erh ern err ert etb etc ete eth etn etr ett hbb hbc hbe hbh hbn hbr hbt hcb hcc hce hch hcn hcr hct he- heb hec hee heh hen her het hhb hhc hhe hhh hhn hhr hht hnb hnc hne hnh hnn hnt hr- hrb hrc hre hrh hrn hrr hrt htb htc hte hth htn htr htt nbb nbc nbe nbn nbr nbt ncb ncc nce nch ncn ncr nct ne- neb nec nee neh nen ner net nhb nhc nhe nhh nhn nhr nht nnb nnc nne nnh nnn nnt nrb nrc nre nrn nrr nrt ntb ntc nte nth ntn ntr ntt rbb rbc rbe rbh rbn rbr rbt rcb rcc rce rch rcn rcr rct re- reb rec ree reh ren rer ret rh- rhb rhc rhe rhh rhn rhr rht rnb rnc rnh rnn rnr rnt rrb rrc rrh rrn rrr rrt rtb rtc rte rtn rtr rtt tbb tbc tbe tbh tbn tbr tbt tcb tcc tce tch tcn tcr tct te- teb tec tee teh ten ter tet th- thb thc the thh thn thr tht tnb tnc tne tnh tnn tnr tnt trb trc tre trh trn trr trt ttb ttc tte tth ttn ttr ttt