-er -ic -up b-p b-u bbb bbc bbe bbi bbp bbr bbu bcb bcc bce bci bcp bcr bcu be- beb bec bee bei bep ber beu bi- bib bic bie bii bip bir biu bpb bpc bpe bpi bpp bpr bpu brb bre bri brp brr bru bub buc bue bui bup bur buu c-- cbb cbc cbe cbi cbp cbr cbu ccb ccc cce cci ccp ccr ccu ce- ceb cec cee cei cep cer ceu ci- cib cic cie cii cip cir ciu cpb cpc cpe cpi cpp cpr cpu crb crc cre cri crp crr cru cub cuc cue cui cup cur cuu ebb ebc ebe ebi ebp ebr ebu ec- ecb ecc ece eci ecr ecu eeb eec eee eep eer eib eic eie eii eip eir eiu ep- epb epc epe epi epp epr epu erb erc ere eri erp err eru eu- eub euc eue eui eup eur ibb ibc ibe ibi ibp ibr ibu icb icc ice ici icp icr icu ie- iec iee iei iep ier iib iic iie iii iip iir iiu ipb ipc ipe ipi ipp ipr ipu ir- irb irc ire iri irp irr iru iu- iub iuc iue iui iup iur p-p pbb pbc pbe pbi pbp pbr pbu pcb pcc pce pci pcp pcr pcu peb pec pee pei pep per peu pib pic pie pii pip pir piu ppb ppc ppe ppi ppp ppr ppu prb prc pre pri prp prr pru pub puc pue pui pup pur puu rbb rbc rbe rbi rbp rbr rbu rcb rcc rce rci rcp rcr rcu re- reb rec ree rei rep rer reu rib ric rie rii rip rir rpb rpc rpe rpi rpp rpr rpu rrb rrc rri rrp rrr rru rub ruc rue rui rup rur ruu ubb ubc ube ubi ubp ubr ubu ucb ucc uce uci ucp ucr ucu ueb uec uee uei uep uer uib uic uie uii uip uir uiu up- upb upc upe upi upp upr upu ur- urb urc ure uri urp urr uru uuc uue uur uuu