-er -ic b-u bbb bbc bbd bbe bbg bbi bbr bbs bbt bbu bcb bcc bcd bce bcg bci bcr bcs bct bcu bdb bdc bdd bde bdg bdi bdr bds bdt bdu be- beb bec bed bee beg bei ber bes bet beu bgb bgc bgd bge bgg bgi bgr bgs bgt bgu bi- bib bic bid bie big bii bir bis bit biu brb brd bre brg bri brr brs brt bru bsb bsc bsd bse bsg bsi bsr bss bst bsu btb btc btd bte btg bti btr bts btt btu bub buc bud bue bug bui bur bus but buu c-- cbb cbc cbd cbe cbg cbi cbr cbs cbt cbu ccb ccc ccd cce ccg cci ccr ccs cct ccu cdb cdc cdd cde cdg cdi cdr cds cdt cdu ce- ceb cec ced cee ceg cei cer ces cet ceu cgb cgc cgd cge cgg cgi cgr cgs cgt cgu ci- cib cic cid cie cig cii cir cis cit ciu crb crc crd cre crg cri crr crs crt cru csb csc csd cse csg csi csr css cst csu ctb ctc ctd cte ctg cti ctr cts ctt ctu cub cuc cud cue cug cui cur cus cut cuu dbb dbc dbd dbe dbg dbi dbr dbs dbt dbu dcb dcc dcd dce dcg dci dcr dcs dct dcu ddb ddc ddd dde ddg ddi ddr dds ddt ddu de- deb dec ded dee deg dei der des det deu dgc dgd dge dgg dgi dgr dgs dgt dgu di- dib dic did die dig dii dir dis dit diu drb drc drd dre drg dri drr drs drt dru dsb dsc dsd dse dsg dsi dsr dss dst dsu dtb dtc dtd dte dtg dti dtr dts dtt dtu dub duc dud due dug dui dur dus dut ebb ebc ebd ebe ebg ebi ebr ebs ebt ebu ec- ecb ecc ecd ece ecg eci ecr ecs ect ecu ed- edb edc edd ede edg edi edr eds edt edu eeb eec eed eee eeg eer ees eet egb egc egd ege egg egi egr egs egt egu eib eic eid eie eig eii eir eis eit eiu erb erc erd ere erg eri err ers ert eru es- esb esc esd ese esg esi esr ess est esu etb etc etd ete etg eti etr ets ett etu eu- eub euc eud eue eug eui eur eus eut g-d gbc gbd gbe gbg gbi gbr gbs gbt gbu gcb gcc gcd gce gcg gci gcr gcs gct gcu gdb gdc gdd gde gdi gdr gds gdt gdu ge- geb gec ged gee geg gei ger ges get geu ggb ggc ggd ggg ggi ggr ggs ggt ggu gib gic gid gie gig gii gir gis git giu grb grc grd gre grg gri grr grs grt gru gsb gsc gsd gse gsg gsi gsr gss gst gsu gtb gtc gtd gte gtg gti gtr gts gtt gtu gu- gub guc gud gue gug gui gur gus gut guu i-d ibb ibc ibd ibe ibg ibi ibr ibs ibt ibu icb icc icd ice icg ici icr ics ict icu idb idc idd ide idg idi idr ids idt idu ie- iec ied iee ieg iei ier ies iet igb igc igd ige igg igi igr igs igt igu iib iic iid iie iii iir iis iit iiu ir- irb irc ird ire irg iri irr irs irt iru is- isb isc isd ise isg isi isr iss ist isu itb itc itd ite itg iti its itt itu iu- iub iuc iud iue iug iui iur ius iut rbb rbc rbd rbe rbg rbi rbr rbs rbt rbu rcb rcc rcd rce rcg rci rcr rcs rct rcu rdb rdc rdd rde rdg rdi rdr rds rdt rdu re- reb rec red ree reg rei rer res ret reu rgb rgc rgd rge rgg rgi rgr rgs rgt rib ric rid rie rig rii rir ris rit rrb rrc rrd rrg rri rrr rrs rrt rru rsb rsc rsd rse rsg rsi rsr rss rst rsu rtb rtc rtd rte rtg rti rtr rts rtt rtu rub ruc rud rue rug rui rur rus rut ruu sbb sbc sbd sbe sbg sbi sbr sbs sbt sbu scb scc scd sce scg sci scr scs sct scu sdb sdc sdd sde sdg sdi sdr sds sdt sdu se- seb sec sed see seg sei ser ses set seu sgb sgc sgd sge sgg sgi sgr sgs sgt sgu sib sic sid sie sig sii sir sis sit siu sr- srb src srd sre srg sri srr srs srt ss- ssb ssc ssd sse ssg ssi ssr sss sst ssu stb stc std ste stg sti str sts stt stu sub suc sud sue sug sui sur sus sut suu tbb tbc tbd tbe tbg tbi tbr tbs tbt tbu tcb tcc tcd tce tcg tci tcr tcs tct tcu tdb tdc tdd tde tdg tdi tdr tds tdt tdu te- teb tec ted tee teg tei ter tes tet teu tgb tgc tge tgg tgi tgr tgs tgt tgu tib tic tid tie tig tii tir tis tit tiu trb trc trd tre trg tri trr trs trt tru tsb tsc tsd tse tsg tsi tsr tss tst tsu ttb ttc ttd tte ttg tti ttr tts ttt ttu tub tuc tud tue tug tui tur tus tut tuu ubb ubc ube ubg ubi ubr ubs ubt ubu ucb ucc ucd uce ucg uci ucr ucs uct ucu udb udc udd ude udg udi udr uds udt udu ueb uec ued uee ueg uei uer ues uet ugb ugc uge ugg ugi ugr ugs ugt ugu uib uic uid uie uig uii uir uis uit uiu ur- urb urc urd ure urg uri urr urs urt uru usb usc usd use usg usi usr uss ust usu utb utc utd ute uti utr uts utt utu uuc uue uug uur uus