-er -ic -up b-p b-u bbb bbc bbd bbe bbi bbk bbp bbr bbs bbu bcb bcc bcd bce bci bck bcp bcr bcs bcu bdb bdc bdd bde bdi bdk bdp bdr bds bdu be- beb bec bed bee bei bek bep ber bes beu bi- bib bic bid bie bii bik bip bir bis biu bkb bkc bke bkk bkp bkr bks bpb bpc bpd bpe bpi bpp bpr bps bpu brb brd bre bri brk brp brr brs bru bsb bsc bsd bse bsi bsk bsp bsr bss bsu bub buc bud bue bui buk bup bur bus buu c-- cbb cbc cbd cbe cbi cbk cbp cbr cbs cbu ccb ccc ccd cce cci cck ccp ccr ccs ccu cdb cdc cdd cde cdi cdk cdp cdr cds cdu ce- ceb cec ced cee cei cek cep cer ces ceu ci- cib cic cid cie cii cik cip cir cis ciu ckb ckc ckd cki cks cpb cpc cpd cpe cpi cpk cpp cpr cps cpu crb crc crd cre cri crk crp crr crs cru csb csc csd cse csi csk csp csr css csu cub cuc cud cue cui cuk cup cur cus cuu dbb dbc dbd dbe dbi dbk dbp dbr dbs dbu dcb dcc dcd dce dci dck dcp dcr dcs dcu ddb ddc ddd dde ddi ddk ddp ddr dds ddu de- deb dec ded dee dei dek dep der des deu di- dib dic did die dii dik dip dir dis diu dkb dkc dke dki dkk dkp dkr dks dku dpb dpc dpd dpe dpi dpk dpp dpr dps dpu drb drc drd dre dri drk drp drr drs dru dsb dsc dsd dse dsi dsk dsp dsr dss dsu dub duc dud due dui duk dup dur dus ebb ebc ebd ebe ebi ebk ebp ebr ebs ebu ec- ecb ecc ecd ece eci eck ecr ecs ecu ed- edb edc edd ede edi edk edp edr eds edu eeb eec eed eee eek eep eer ees eib eic eid eie eii eik eip eir eis eiu ekb ekc ekd eke eki ekp ekr eks eku ep- epb epc epd epe epi epp epr eps epu erb erc erd ere eri erk erp err ers eru es- esb esc esd ese esi esk esp esr ess esu eu- eub euc eud eue eui eup eur eus i-d ibb ibc ibd ibe ibi ibk ibp ibr ibs ibu icb icc icd ice ici ick icp icr ics icu idb idc idd ide idi idk idp idr ids idu ie- iec ied iee iei iek iep ier ies iib iic iid iie iii iip iir iis iiu ikb ikc ike iki ikk ikr iks iku ipb ipc ipd ipe ipi ipp ipr ips ipu ir- irb irc ird ire iri irk irp irr irs iru is- isb isc isd ise isi isk isp isr iss isu iu- iub iuc iud iue iui iup iur ius kbb kbc kbd kbe kbi kbk kbp kbr kbs kbu kcb kcc kcd kce kci kck kcp kcr kcs kcu kdb kdc kde kdk kdp kdr kds kdu ke- keb kec ked kee kei kek kep ker kes kib kic kid kie kii kik kip kir kis kiu kkb kkc kke kki kkk kkp kkr kks kku kpc kpd kpe kpi kpk kpp kpr kps kpu krc krd kri krk krp krr krs kru ksb ksc ksd kse ksi ksk ksp ksr kss ksu kub kuc kud kue kui kuk kup kur kus kuu p-p pbb pbc pbd pbe pbi pbk pbp pbr pbs pbu pcb pcc pcd pce pci pck pcp pcr pcs pcu pdb pdc pdd pde pdi pdk pdp pdr pds pdu peb pec ped pee pei pek pep per pes peu pib pic pid pie pii pik pip pir pis piu pkb pkc pkd pke pki pkp pkr pks pku ppb ppc ppd ppe ppi ppk ppp ppr pps ppu prb prc prd pre pri prk prp prr prs pru ps- psb psc psd pse psi psk psp psr pss psu pub puc pud pue pui puk pup pur pus puu rbb rbc rbd rbe rbi rbk rbp rbr rbs rbu rcb rcc rcd rce rci rcp rcr rcs rcu rdb rdc rdd rde rdi rdp rdr rds rdu re- reb rec red ree rei rek rep rer res reu rib ric rid rie rii rik rip rir ris rkb rkc rke rkk rkp rks rku rpb rpc rpd rpe rpi rpk rpp rpr rps rpu rrb rrc rrd rri rrk rrp rrr rrs rru rsb rsc rsd rse rsi rsk rsp rsr rss rsu rub ruc rud rue rui ruk rup rur rus ruu sbb sbc sbd sbe sbi sbk sbp sbr sbs sbu scb scc scd sce sci sck scp scr scs scu sdb sdc sdd sde sdi sdk sdp sdr sds sdu se- seb sec sed see sei sek sep ser ses seu sib sic sid sie sii sik sip sir sis siu sk- skb skc skd ske ski skk skp skr sks sku spb spc spd spe spi spk spp spr sps spu sr- srb src srd sre sri srk srp srr srs ss- ssb ssc ssd sse ssi ssk ssp ssr sss ssu sub suc sud sue sui suk sup sur sus suu ubb ubc ube ubi ubk ubp ubr ubs ubu ucb ucc ucd uce uci uck ucp ucr ucs ucu udb udc udd ude udi udk udp udr uds udu ueb uec ued uee uei uep uer ues uib uic uid uie uii uip uir uis uiu ukb ukc uke uki ukk ukp ukr uku up- upb upc upd upe upi upk upp upr ups upu ur- urb urc urd ure uri urk urp urr urs uru usb usc usd use usi usk usp usr uss usu uuc uue uur uus uuu

bbbb bbbs bbci bbdd bbeb bbpr bbrc bcbc bcbp bcbs bccc bcci bccs bcde bcds bcec bcer bces bcie bcis bcpp bcps