-er -ic -up b-p b-u bbb bbc bbe bbi bbp bbr bbt bbu bcb bcc bce bci bcp bcr bct bcu be- beb bec bee bei bep ber bet beu bi- bib bic bie bii bip bir bit biu bpb bpc bpe bpi bpp bpr bpt bpu brb bre bri brp brr brt bru btb btc bte bti btp btr btt btu bub buc bue bui bup bur but buu c-- cbb cbc cbe cbi cbp cbr cbt cbu ccb ccc cce cci ccp ccr cct ccu ce- ceb cec cee cei cep cer cet ceu ci- cib cic cie cii cip cir cit ciu cpb cpc cpe cpi cpp cpr cpt cpu crb crc cre cri crp crr crt cru ctb ctc cte cti ctp ctr ctt ctu cub cuc cue cui cup cur cut cuu ebb ebc ebe ebi ebp ebr ebt ebu ec- ecb ecc ece eci ecr ect ecu eeb eec eee eep eer eet eib eic eie eii eip eir eit eiu ep- epb epc epe epi epp epr ept epu erb erc ere eri erp err ert eru etb etc ete eti etp etr ett etu eu- eub euc eue eui eup eur eut ibb ibc ibe ibi ibp ibr ibt ibu icb icc ice ici icp icr ict icu ie- iec iee iei iep ier iet iib iic iie iii iip iir iit iiu ipb ipc ipe ipi ipp ipr ipt ipu ir- irb irc ire iri irp irr irt iru itb itc ite iti itp itt itu iu- iub iuc iue iui iup iur iut p-p pbb pbc pbe pbi pbp pbr pbt pbu pcb pcc pce pci pcp pcr pct pcu peb pec pee pei pep per pet peu pib pic pie pii pip pir pit piu ppb ppc ppe ppi ppp ppr ppt ppu prb prc pre pri prp prr prt pru pt- ptb ptc pte pti ptp ptr ptt ptu pub puc pue pui pup pur put puu rbb rbc rbe rbi rbp rbr rbt rbu rcb rcc rce rci rcp rcr rct rcu re- reb rec ree rei rep rer ret reu rib ric rie rii rip rir rit rpb rpc rpe rpi rpp rpr rpt rpu rrb rrc rri rrp rrr rrt rru rtb rtc rte rti rtp rtr rtt rtu rub ruc rue rui rup rur rut ruu tbb tbc tbe tbi tbp tbr tbt tbu tcb tcc tce tci tcp tcr tct tcu te- teb tec tee tei tep ter tet teu tib tic tie tii tip tir tit tiu tpb tpc tpe tpi tpp tpr tpt tpu trb trc tre tri trp trr trt tru ttb ttc tte tti ttp ttr ttt ttu tub tuc tue tui tup tur tut tuu ubb ubc ube ubi ubp ubr ubt ubu ucb ucc uce uci ucp ucr uct ucu ueb uec uee uei uep uer uet uib uic uie uii uip uir uit uiu up- upb upc upe upi upp upr upt upu ur- urb urc ure uri urp urr urt uru utb utc ute uti utp utr utt utu uuc uue uur uut uuu