-er -up b-p b-u bbb bbc bbe bbk bbp bbr bbt bbu bcb bcc bce bck bcp bcr bct bcu be- beb bec bee bek bep ber bet beu bkb bkc bke bkk bkp bkr bkt bpb bpc bpe bpp bpr bpt bpu brb bre brk brp brr brt bru btb btc bte btk btp btr btt btu bub buc bue buk bup bur but buu c-- cbb cbc cbe cbk cbp cbr cbt cbu ccb ccc cce cck ccp ccr cct ccu ce- ceb cec cee cek cep cer cet ceu ckb ckc ckt cpb cpc cpe cpk cpp cpr cpt cpu crb crc cre crk crp crr crt cru ctb ctc cte ctk ctp ctr ctt ctu cub cuc cue cuk cup cur cut cuu ebb ebc ebe ebk ebp ebr ebt ebu ec- ecb ecc ece eck ecr ect ecu eeb eec eee eek eep eer eet ekb ekc eke ekp ekr ekt eku ep- epb epc epe epp epr ept epu erb erc ere erk erp err ert eru etb etc ete etk etp etr ett etu eu- eub euc eue eup eur eut k-t kbb kbc kbe kbk kbp kbr kbu kcb kcc kce kck kcp kcr kct kcu ke- keb kec kee kek kep ker ket kkb kkc kke kkk kkp kkr kkt kku kpc kpe kpk kpp kpr kpt kpu krc krk krp krr krt kru ktb ktc kte ktk ktp ktr ktt ktu kub kuc kue kuk kup kur kut kuu p-p pbb pbc pbe pbk pbp pbr pbt pbu pcb pcc pce pck pcp pcr pct pcu peb pec pee pek pep per pet peu pkb pkc pke pkp pkr pkt pku ppb ppc ppe ppk ppp ppr ppt ppu prb prc pre prk prp prr prt pru pt- ptb ptc pte ptk ptp ptr ptt ptu pub puc pue puk pup pur put puu rbb rbc rbe rbk rbp rbr rbt rbu rcb rcc rce rcp rcr rct rcu re- reb rec ree rek rep rer ret reu rkb rkc rke rkk rkp rkt rku rpb rpc rpe rpk rpp rpr rpt rpu rrb rrc rrk rrp rrr rrt rru rtb rtc rte rtk rtp rtr rtt rtu rub ruc rue ruk rup rur rut ruu tbb tbc tbe tbk tbp tbr tbt tbu tcb tcc tce tck tcp tcr tct tcu te- teb tec tee tek tep ter tet teu tkb tkc tke tkk tkp tkr tkt tpb tpc tpe tpk tpp tpr tpt tpu trb trc tre trk trp trr trt tru ttb ttc tte ttk ttp ttr ttt ttu tub tuc tue tuk tup tur tut tuu ubb ubc ube ubk ubp ubr ubt ubu ucb ucc uce uck ucp ucr uct ucu ueb uec uee uep uer uet ukb ukc uke ukk ukp ukr uku up- upb upc upe upk upp upr upt upu ur- urb urc ure urk urp urr urt uru utb utc ute utk utp utr utt utu uuc uue uur uut uuu