-er -ic -up b-p b-u bbb bbc bbe bbi bbk bbl bbp bbr bbs bbu bcb bcc bce bci bck bcl bcp bcr bcs bcu be- beb bec bee bei bek bel bep ber bes beu bi- bib bic bie bii bik bil bip bir bis biu bkb bkc bke bkk bkl bkp bkr bks blb blc ble bli blk bll blp blr bls blu bpb bpc bpe bpi bpl bpp bpr bps bpu brb bre bri brk brl brp brr brs bru bsb bsc bse bsi bsk bsl bsp bsr bss bsu bub buc bue bui buk bul bup bur bus buu c-- cbb cbc cbe cbi cbk cbl cbp cbr cbs cbu ccb ccc cce cci cck ccl ccp ccr ccs ccu ce- ceb cec cee cei cek cel cep cer ces ceu ci- cib cic cie cii cik cil cip cir cis ciu ckb ckc cki cks cl- clb clc cle cli clk cll clp clr cls clu cpb cpc cpe cpi cpk cpl cpp cpr cps cpu crb crc cre cri crk crl crp crr crs cru csb csc cse csi csk csl csp csr css csu cub cuc cue cui cuk cul cup cur cus cuu ebb ebc ebe ebi ebk ebl ebp ebr ebs ebu ec- ecb ecc ece eci eck ecl ecr ecs ecu eeb eec eee eek eel eep eer ees eib eic eie eii eik eil eip eir eis eiu ekb ekc eke eki ekl ekp ekr eks eku elb elc ele eli elk ell elp elr els elu ep- epb epc epe epi epl epp epr eps epu erb erc ere eri erk erl erp err ers eru es- esb esc ese esi esk esl esp esr ess esu eu- eub euc eue eui eul eup eur eus ibb ibc ibe ibi ibk ibl ibp ibr ibs ibu icb icc ice ici ick icl icp icr ics icu ie- iec iee iei iek iel iep ier ies iib iic iie iii iil iip iir iis iiu ikb ikc ike iki ikk ikl ikr iks iku il- ilb ilc ile ili ilk ill ilp ilr ils ilu ipb ipc ipe ipi ipl ipp ipr ips ipu ir- irb irc ire iri irk irl irp irr irs iru is- isb isc ise isi isk isl isp isr iss isu iu- iub iuc iue iui iup iur ius kbb kbc kbe kbi kbk kbl kbp kbr kbs kbu kcb kcc kce kci kck kcl kcp kcr kcs kcu ke- keb kec kee kei kek kel kep ker kes kib kic kie kii kik kil kip kir kis kiu kkb kkc kke kki kkk kkl kkp kkr kks kku kl- klb klc kli klr kls klu kpc kpe kpi kpk kpl kpp kpr kps kpu krc kri krk krl krp krr krs kru ksb ksc kse ksi ksk ksl ksp ksr kss ksu kub kuc kue kui kuk kul kup kur kus kuu l-p lbb lbc lbe lbi lbk lbl lbp lbr lbs lbu lcb lcc lce lci lck lcl lcp lcr lcs lcu leb lec lee lei lek lel lep ler les leu lib lic lie lii lik lil lip lir lis liu lkb lkl lkp lkr lks llb llc lle lli llk lll llp llr lls llu lpb lpc lpe lpi lpk lpl lpp lpr lps lpu lrb lrc lri lrk lrp lrr lrs lru lsb lsc lse lsi lsk lsl lsp lsr lss lsu lub luc lue lui luk lul lup lur lus luu p-p pbb pbc pbe pbi pbk pbl pbp pbr pbs pbu pcb pcc pce pci pck pcl pcp pcr pcs pcu peb pec pee pei pek pel pep per pes peu pib pic pie pii pik pil pip pir pis piu pkb pkc pke pki pkl pkp pkr pks pku plb plc ple pli plk pll plp plr pls plu ppb ppc ppe ppi ppk ppl ppp ppr pps ppu prb prc pre pri prk prl prp prr prs pru ps- psb psc pse psi psk psl psp psr pss psu pub puc pue pui puk pul pup pur pus puu rbb rbc rbe rbi rbk rbl rbp rbr rbs rbu rcb rcc rce rci rcl rcp rcr rcs rcu re- reb rec ree rei rek rel rep rer res reu rib ric rie rii rik ril rip rir ris rkb rkc rke rkk rkp rks rku rlc rle rli rll rlp rlr rls rlu rpb rpc rpe rpi rpk rpl rpp rpr rps rpu rrb rrc rri rrk rrl rrp rrr rrs rru rsb rsc rse rsi rsk rsl rsp rsr rss rsu rub ruc rue rui ruk rup rur rus ruu sbb sbc sbe sbi sbk sbl sbp sbr sbs sbu scb scc sce sci sck scl scp scr scs scu se- seb sec see sei sek sel sep ser ses seu sib sic sie sii sik sil sip sir sis siu sk- skb skc ske ski skk skl skp skr sks sku slb slc sle sli slk sll slp slr sls slu spb spc spe spi spk spl spp spr sps spu sr- srb src sre sri srk srl srp srr srs ss- ssb ssc sse ssi ssk ssl ssp ssr sss ssu sub suc sue sui suk sul sup sur sus suu ubb ubc ube ubi ubk ubl ubp ubr ubs ubu ucb ucc uce uci uck ucl ucp ucr ucs ucu ueb uec uee uei uel uep uer ues uib uic uie uii uil uip uir uis uiu ukb ukc uke uki ukk ukl ukp ukr uku ulb ulc ule uli ulk ull ulp ulr uls ulu up- upb upc upe upi upk upp upr ups upu ur- urb urc ure uri urk url urp urr urs uru usb usc use usi usk usl usp usr uss usu uuc uue uur uus uuu

bbbb bbbs bbci bbeb bblb bbls bbpr bbrc bcbc bcbp bcbs bccc bcci bccl bccs bcec bcer bces bcie bcis bcpl bcpp bcps bcrs bcru bcsc bcsl bcss bcuc