-er -ic b-u bbb bbc bbe bbi bbm bbr bbs bbt bbu bcb bcc bce bci bcm bcr bcs bct bcu be- beb bec bee bei bem ber bes bet beu bi- bib bic bie bii bim bir bis bit biu bmb bmc bme bmi bmm bmr bms bmt bmu brb bre bri brm brr brs brt bru bsb bsc bse bsi bsm bsr bss bst bsu btb btc bte bti btm btr bts btt btu bub buc bue bui bum bur bus but buu c-- cbb cbc cbe cbi cbm cbr cbs cbt cbu ccb ccc cce cci ccm ccr ccs cct ccu ce- ceb cec cee cei cem cer ces cet ceu ci- cib cic cie cii cim cir cis cit ciu cmb cmc cme cmi cmm cmr cms cmt cmu crb crc cre cri crm crr crs crt cru csb csc cse csi csm csr css cst csu ctb ctc cte cti ctm ctr cts ctt ctu cub cuc cue cui cum cur cus cut cuu ebb ebc ebe ebi ebm ebr ebs ebt ebu ec- ecb ecc ece eci ecm ecr ecs ect ecu eeb eec eee eem eer ees eet eib eic eie eii eim eir eis eit eiu em- emb emc eme emi emm emr ems emt emu erb erc ere eri erm err ers ert eru es- esb esc ese esi esm esr ess est esu etb etc ete eti etm etr ets ett etu eu- eub euc eue eui eur eus eut ibb ibc ibe ibi ibm ibr ibs ibt ibu icb icc ice ici icm icr ics ict icu ie- iec iee iei iem ier ies iet iib iic iie iii iim iir iis iit iiu im- imb imc ime imi imm ims imt imu ir- irb irc ire iri irm irr irs irt iru is- isb isc ise isi ism isr iss ist isu itb itc ite iti itm its itt itu iu- iub iuc iue iui ium iur ius iut m-r mbb mbc mbe mbi mbm mbr mbs mbt mbu mc- mcb mcc mce mci mcm mcr mcs mct mcu meb mec mee mei mem mer mes met meu mi- mib mic mie mii mim mir mis mit miu mmb mmc mme mmi mmm mmr mms mmt mmu mrb mrc mre mri mrm mrr mrs mrt mru msb msc mse msi msm msr mss mst msu mtb mtc mte mti mtm mtr mts mtt mtu mub muc mue mui mum mur mus mut muu rbb rbc rbe rbi rbm rbr rbs rbt rbu rcb rcc rce rci rcm rcr rcs rct rcu re- reb rec ree rei rem rer res ret reu rib ric rie rii rim rir ris rit rmb rmc rme rmi rmm rmr rms rmt rrb rrc rri rrm rrr rrs rrt rru rsb rsc rse rsi rsm rsr rss rst rsu rtb rtc rte rti rtm rtr rts rtt rtu rub ruc rue rui rum rur rus rut ruu sbb sbc sbe sbi sbm sbr sbs sbt sbu scb scc sce sci scm scr scs sct scu se- seb sec see sei sem ser ses set seu sib sic sie sii sim sir sis sit siu smb smc sme smi smm smr sms smt smu sr- srb src sre sri srm srr srs srt ss- ssb ssc sse ssi ssm ssr sss sst ssu stb stc ste sti stm str sts stt stu sub suc sue sui sum sur sus sut suu tbb tbc tbe tbi tbm tbr tbs tbt tbu tcb tcc tce tci tcm tcr tcs tct tcu te- teb tec tee tei tem ter tes tet teu tib tic tie tii tim tir tis tit tiu tmb tmc tme tmi tmm tmr tms tmt tmu trb trc tre tri trm trr trs trt tru tsb tsc tse tsi tsm tsr tss tst tsu ttb ttc tte tti ttm ttr tts ttt ttu tub tuc tue tui tum tur tus tut tuu ubb ubc ube ubi ubr ubs ubt ubu ucb ucc uce uci ucm ucr ucs uct ucu ueb uec uee uei uem uer ues uet uib uic uie uii uim uir uis uit uiu um- umb umc ume umi umm umr ums umt umu ur- urb urc ure uri urm urr urs urt uru usb usc use usi usm usr uss ust usu utb utc ute uti utm utr uts utt utu uuc uue uum uur uus uut uuu