-er -ic b-u bbb bbc bbd bbe bbi bbo bbr bbs bbt bbu bcb bcc bcd bce bci bco bcr bcs bct bcu bdb bdc bdd bde bdi bdo bdr bds bdt bdu be- beb bec bed bee bei beo ber bes bet beu bi- bib bic bid bie bii bio bir bis bit biu bob boc bod boe boi boo bor bos bot bou brb brd bre bri bro brr brs brt bru bsb bsc bsd bse bsi bso bsr bss bst bsu btb btc btd bte bti bto btr bts btt btu bub buc bud bue bui buo bur bus but buu c-- cbb cbc cbd cbe cbi cbo cbr cbs cbt cbu ccb ccc ccd cce cci cco ccr ccs cct ccu cdb cdc cdd cde cdi cdo cdr cds cdt cdu ce- ceb cec ced cee cei ceo cer ces cet ceu ci- cib cic cid cie cii cio cir cis cit ciu co- cob coc cod coe coi coo cor cos cot cou crb crc crd cre cri cro crr crs crt cru csb csc csd cse csi cso csr css cst csu ctb ctc ctd cte cti cto ctr cts ctt ctu cub cuc cud cue cui cuo cur cus cut cuu dbb dbc dbd dbe dbi dbo dbr dbs dbt dbu dcb dcc dcd dce dci dco dcr dcs dct dcu ddb ddc ddd dde ddi ddo ddr dds ddt ddu de- deb dec ded dee dei deo der des det deu di- dib dic did die dii dio dir dis dit diu dob doc dod doe doi doo dor dos dot dou drb drc drd dre dri dro drr drs drt dru dsb dsc dsd dse dsi dso dsr dss dst dsu dtb dtc dtd dte dti dto dtr dts dtt dtu dub duc dud due dui duo dur dus dut ebb ebc ebd ebe ebi ebo ebr ebs ebt ebu ec- ecb ecc ecd ece eci eco ecr ecs ect ecu ed- edb edc edd ede edi edo edr eds edt edu eeb eec eed eee eeo eer ees eet eib eic eid eie eii eio eir eis eit eiu eo- eob eoc eod eoe eoi eoo eor eos eot eou erb erc erd ere eri ero err ers ert eru es- esb esc esd ese esi eso esr ess est esu etb etc etd ete eti eto etr ets ett etu eu- eub euc eud eue eui eur eus eut i-d ibb ibc ibd ibe ibi ibo ibr ibs ibt ibu icb icc icd ice ici ico icr ics ict icu idb idc idd ide idi ido idr ids idt idu ie- iec ied iee iei ier ies iet iib iic iid iie iii iio iir iis iit iiu io- iob ioc iod ioe ioi ioo ior ios iot iou ir- irb irc ird ire iri iro irr irs irt iru is- isb isc isd ise isi iso isr iss ist isu itb itc itd ite iti ito its itt itu iu- iub iuc iud iue iui iur ius iut o-i ob- obb obc obd obe obi obo obr obs obt obu oc- ocb occ ocd oci oco ocr ocs oct ocu odb odc odd ode odi odo odr ods odt odu oeb oec oed oee oei oeo oer oes oet oib oic oid oie oii oio oir ois oit oiu oo- oob ooc ood ooi ooo oor oos oot or- orb orc ord ore ori oro orr ors ort oru os- osb osc osd ose osi oso osr oss ost osu ot- otb otc otd ote oti oto otr ots ott otu ou- ouc oud oue oui ouo our ous out rbb rbc rbd rbe rbi rbo rbr rbs rbt rbu rcb rcc rcd rce rci rco rcr rcs rct rcu rdb rdc rdd rde rdi rdo rdr rds rdt rdu re- reb rec red ree rei reo rer res ret reu rib ric rid rie rii rio rir ris rit rob roc rod roe roi roo ror ros rot rou rrb rrc rrd rri rrr rrs rrt rru rsb rsc rsd rse rsi rso rsr rss rst rsu rtb rtc rtd rte rti rto rtr rts rtt rtu rub ruc rud rue rui ruo rur rus rut ruu sbb sbc sbd sbe sbi sbo sbr sbs sbt sbu scb scc scd sce sci sco scr scs sct scu sdb sdc sdd sde sdi sdo sdr sds sdt sdu se- seb sec sed see sei seo ser ses set seu sib sic sid sie sii sio sir sis sit siu sob soc sod soe soi soo sor sos sot sou sr- srb src srd sre sri sro srr srs srt ss- ssb ssc ssd sse ssi sso ssr sss sst ssu stb stc std ste sti sto str sts stt stu sub suc sud sue sui suo sur sus sut suu tbb tbc tbd tbe tbi tbo tbr tbs tbt tbu tcb tcc tcd tce tci tco tcr tcs tct tcu tdb tdc tdd tde tdi tdo tdr tds tdt tdu te- teb tec ted tee tei teo ter tes tet teu tib tic tid tie tii tio tir tis tit tiu to- tob toc tod toe toi too tor tos tot tou trb trc trd tre tri tro trr trs trt tru tsb tsc tsd tse tsi tso tsr tss tst tsu ttb ttc ttd tte tti tto ttr tts ttt ttu tub tuc tud tue tui tuo tur tus tut tuu ubb ubc ube ubi ubo ubr ubs ubt ubu ucb ucc ucd uce uci uco ucr ucs uct ucu udb udc udd ude udi udo udr uds udt udu ueb uec ued uee uei uer ues uet uib uic uid uie uii uio uir uis uit uiu uob uoc uod uoe uoo uor uos uot ur- urb urc urd ure uri uro urr urs urt uru usb usc usd use usi uso usr uss ust usu utb utc utd ute uti uto utr uts utt utu