-er -ic -up b-p b-u bbb bbc bbe bbi bbk bbl bbp bbr bbu bcb bcc bce bci bck bcl bcp bcr bcu be- beb bec bee bei bek bel bep ber beu bi- bib bic bie bii bik bil bip bir biu bkb bkc bke bkk bkl bkp bkr blb blc ble bli blk bll blp blr blu bpb bpc bpe bpi bpl bpp bpr bpu brb bre bri brk brl brp brr bru bub buc bue bui buk bul bup bur buu c-- cbb cbc cbe cbi cbk cbl cbp cbr cbu ccb ccc cce cci cck ccl ccp ccr ccu ce- ceb cec cee cei cek cel cep cer ceu ci- cib cic cie cii cik cil cip cir ciu ckb ckc cki cl- clb clc cle cli clk cll clp clr clu cpb cpc cpe cpi cpk cpl cpp cpr cpu crb crc cre cri crk crl crp crr cru cub cuc cue cui cuk cul cup cur cuu ebb ebc ebe ebi ebk ebl ebp ebr ebu ec- ecb ecc ece eci eck ecl ecr ecu eeb eec eee eek eel eep eer eib eic eie eii eik eil eip eir eiu ekb ekc eke eki ekl ekp ekr eku elb elc ele eli elk ell elp elr elu ep- epb epc epe epi epl epp epr epu erb erc ere eri erk erl erp err eru eu- eub euc eue eui eul eup eur ibb ibc ibe ibi ibk ibl ibp ibr ibu icb icc ice ici ick icl icp icr icu ie- iec iee iei iek iel iep ier iib iic iie iii iil iip iir iiu ikb ikc ike iki ikk ikl ikr iku il- ilb ilc ile ili ilk ill ilp ilr ilu ipb ipc ipe ipi ipl ipp ipr ipu ir- irb irc ire iri irk irl irp irr iru iu- iub iuc iue iui iup iur kbb kbc kbe kbi kbk kbl kbp kbr kbu kcb kcc kce kci kck kcl kcp kcr kcu ke- keb kec kee kei kek kel kep ker kib kic kie kii kik kil kip kir kiu kkb kkc kke kki kkk kkl kkp kkr kku kl- klb klc kli klr klu kpc kpe kpi kpk kpl kpp kpr kpu krc kri krk krl krp krr kru kub kuc kue kui kuk kul kup kur kuu l-p lbb lbc lbe lbi lbk lbl lbp lbr lbu lcb lcc lce lci lck lcl lcp lcr lcu leb lec lee lei lek lel lep ler leu lib lic lie lii lik lil lip lir liu lkb lkl lkp lkr llb llc lle lli llk lll llp llr llu lpb lpc lpe lpi lpk lpl lpp lpr lpu lrb lrc lri lrk lrp lrr lru lub luc lue lui luk lul lup lur luu p-p pbb pbc pbe pbi pbk pbl pbp pbr pbu pcb pcc pce pci pck pcl pcp pcr pcu peb pec pee pei pek pel pep per peu pib pic pie pii pik pil pip pir piu pkb pkc pke pki pkl pkp pkr pku plb plc ple pli plk pll plp plr plu ppb ppc ppe ppi ppk ppl ppp ppr ppu prb prc pre pri prk prl prp prr pru pub puc pue pui puk pul pup pur puu rbb rbc rbe rbi rbk rbl rbp rbr rbu rcb rcc rce rci rcl rcp rcr rcu re- reb rec ree rei rek rel rep rer reu rib ric rie rii rik ril rip rir rkb rkc rke rkk rkp rku rlc rle rli rll rlp rlr rlu rpb rpc rpe rpi rpk rpl rpp rpr rpu rrb rrc rri rrk rrl rrp rrr rru rub ruc rue rui ruk rup rur ruu ubb ubc ube ubi ubk ubl ubp ubr ubu ucb ucc uce uci uck ucl ucp ucr ucu ueb uec uee uei uel uep uer uib uic uie uii uil uip uir uiu ukb ukc uke uki ukk ukl ukp ukr uku ulb ulc ule uli ulk ull ulp ulr ulu up- upb upc upe upi upk upp upr upu ur- urb urc ure uri urk url urp urr uru uuc uue uur uuu