-er -th b-u bbb bbc bbe bbh bbk bbn bbr bbt bbu bcb bcc bce bch bck bcn bcr bct bcu be- beb bec bee beh bek ben ber bet beu bhb bhc bhe bhh bhk bhr bht bhu bkb bkc bke bkk bkn bkr bkt bnb bnc bne bnk bnn bnr bnt bnu brb bre brh brk brn brr brt bru btb btc bte bth btk btn btr btt btu bub buc bue buh buk bun bur but buu c-- cbb cbc cbe cbh cbk cbn cbr cbt cbu ccb ccc cce cch cck ccn ccr cct ccu ce- ceb cec cee ceh cek cen cer cet ceu ch- chb chc che chh chk chn chr cht chu ckb ckc ckh ckt cn- cnb cnc cne cnh cnn cnr cnt cnu crb crc cre crh crk crn crr crt cru ctb ctc cte cth ctk ctn ctr ctt ctu cub cuc cue cuh cuk cun cur cut cuu ebb ebc ebe ebh ebk ebn ebr ebt ebu ec- ecb ecc ece ech eck ecn ecr ect ecu eeb eec eee eek een eer eet ehb ehc ehe ehh ehn ehr eht ehu ekb ekc eke ekh ekr ekt eku en- enb enc ene enh enk enn enr ent enu erb erc ere erh erk ern err ert eru etb etc ete eth etk etn etr ett etu eu- eub euc eue eun eur eut hbb hbc hbe hbh hbk hbn hbr hbt hbu hcb hcc hce hch hck hcn hcr hct he- heb hec hee heh hek hen her het heu hhb hhc hhe hhh hhk hhn hhr hht hhu hkb hkh hkk hkn hkr hkt hku hnb hnc hne hnh hnk hnn hnt hnu hr- hrb hrc hre hrh hrk hrn hrr hrt hru htb htc hte hth htk htn htr htt hub huc hue huh huk hun hur hut huu k-t kbb kbc kbe kbh kbk kbn kbr kbu kcb kcc kce kch kck kcn kcr kct kcu ke- keb kec kee keh kek ken ker ket khe khh khk khn khr khu kkb kkc kke kkh kkk kkn kkr kkt kku kn- knc kne knk knn knr knt knu krc krk krn krr krt kru ktb ktc kte kth ktk ktn ktr ktt ktu kub kuc kue kuh kuk kun kur kut kuu nbb nbc nbe nbk nbn nbr nbt nbu ncb ncc nce nch nck ncn ncr nct ncu ne- neb nec nee neh nek nen ner net neu nhb nhc nhe nhh nhk nhn nhr nht nhu nkc nke nkk nkn nkr nkt nku nnb nnc nne nnh nnk nnn nnt nnu nrb nrc nre nrk nrn nrr nrt nru ntb ntc nte nth ntk ntn ntr ntt ntu nub nuc nue nuh nuk nun nur nut nuu rbb rbc rbe rbh rbk rbn rbr rbt rbu rcb rcc rce rch rcn rcr rct rcu re- reb rec ree reh rek ren rer ret reu rh- rhb rhc rhe rhh rhn rhr rht rhu rkb rkc rke rkk rkt rku rnb rnc rnh rnn rnr rnt rnu rrb rrc rrh rrk rrn rrr rrt rru rtb rtc rte rtk rtn rtr rtt rtu rub ruc rue ruh ruk run rur rut ruu tbb tbc tbe tbh tbk tbn tbr tbt tbu tcb tcc tce tch tck tcn tcr tct tcu te- teb tec tee teh tek ten ter tet teu th- thb thc the thh thk thn thr tht thu tkb tkc tke tkk tkr tkt tnb tnc tne tnh tnk tnn tnr tnt trb trc tre trh trk trn trr trt tru ttb ttc tte tth ttk ttn ttr ttt ttu tub tuc tue tuh tuk tun tur tut tuu ubb ubc ube ubh ubk ubn ubr ubt ubu ucb ucc uce uch uck ucn ucr uct ucu ueb uec uee ueh uen uer uet uhb uhc uhe uhh uhr uht uhu ukb ukc uke ukk ukn ukr uku un- unb unc une unh unk unn unr unt unu ur- urb urc ure urk urn urr urt uru utb utc ute uth utk utn utr utt utu uuc uue uun uur uut uuu