-er -ic -up b-p b-u bbb bbc bbe bbi bbl bbp bbr bbu bcb bcc bce bci bcl bcp bcr bcu be- beb bec bee bei bel bep ber beu bi- bib bic bie bii bil bip bir biu blb blc ble bli bll blp blr blu bpb bpc bpe bpi bpl bpp bpr bpu brb bre bri brl brp brr bru bub buc bue bui bul bup bur buu c-- cbb cbc cbe cbi cbl cbp cbr cbu ccb ccc cce cci ccl ccp ccr ccu ce- ceb cec cee cei cel cep cer ceu ci- cib cic cie cii cil cip cir ciu cl- clb clc cle cli cll clp clr clu cpb cpc cpe cpi cpl cpp cpr cpu crb crc cre cri crl crp crr cru cub cuc cue cui cul cup cur cuu ebb ebc ebe ebi ebl ebp ebr ebu ec- ecb ecc ece eci ecl ecr ecu eeb eec eee eel eep eer eib eic eie eii eil eip eir eiu elb elc ele eli ell elp elr elu ep- epb epc epe epi epl epp epr epu erb erc ere eri erl erp err eru eu- eub euc eue eui eul eup eur ibb ibc ibe ibi ibl ibp ibr ibu icb icc ice ici icl icp icr icu ie- iec iee iei iel iep ier iib iic iie iii iil iip iir iiu il- ilb ilc ile ili ill ilp ilr ilu ipb ipc ipe ipi ipl ipp ipr ipu ir- irb irc ire iri irl irp irr iru iu- iub iuc iue iui iup iur l-p lbb lbc lbe lbi lbl lbp lbr lbu lcb lcc lce lci lcl lcp lcr lcu leb lec lee lei lel lep ler leu lib lic lie lii lil lip lir liu llb llc lle lli lll llp llr llu lpb lpc lpe lpi lpl lpp lpr lpu lrb lrc lri lrp lrr lru lub luc lue lui lul lup lur luu p-p pbb pbc pbe pbi pbl pbp pbr pbu pcb pcc pce pci pcl pcp pcr pcu peb pec pee pei pel pep per peu pib pic pie pii pil pip pir piu plb plc ple pli pll plp plr plu ppb ppc ppe ppi ppl ppp ppr ppu prb prc pre pri prl prp prr pru pub puc pue pui pul pup pur puu rbb rbc rbe rbi rbl rbp rbr rbu rcb rcc rce rci rcl rcp rcr rcu re- reb rec ree rei rel rep rer reu rib ric rie rii ril rip rir rlc rle rli rll rlp rlr rlu rpb rpc rpe rpi rpl rpp rpr rpu rrb rrc rri rrl rrp rrr rru rub ruc rue rui rup rur ruu ubb ubc ube ubi ubl ubp ubr ubu ucb ucc uce uci ucl ucp ucr ucu ueb uec uee uei uel uep uer uib uic uie uii uil uip uir uiu ulb ulc ule uli ull ulp ulr ulu up- upb upc upe upi upp upr upu ur- urb urc ure uri url urp urr uru uuc uue uur uuu