-er -ic a-a a-b a-c a-i aaa aab aac aae aag aai aao aar aas aau ab- aba abb abc abe abg abi abo abr abs abu ac- aca acb acc ace acg aci aco acr acs acu aea aeb aec aee aeg aei aeo aer aes aeu ag- aga agb agc age agg agi ago agr ags agu ai- aia aib aic aie aig aii aio air ais aiu aoa aob aoc aoe aog aoi aoo aor aos aou ar- ara arb arc are arg ari aro arr ars aru as- asa asb asc ase asg asi aso asr ass asu au- aua aub auc aue aug aui auo aur aus b-u baa bab bac bae bag bai bao bar bas bau bba bbb bbc bbe bbg bbi bbo bbr bbs bbu bca bcb bcc bce bcg bci bco bcr bcs bcu be- bea beb bec bee beg bei beo ber bes beu bga bgb bgc bge bgg bgi bgo bgr bgs bgu bi- bia bib bic bie big bii bio bir bis biu boa bob boc boe bog boi boo bor bos bou bra brb bre brg bri bro brr brs bru bsa bsb bsc bse bsg bsi bso bsr bss bsu bua bub buc bue bug bui buo bur bus buu c-- caa cab cac cae cag cai cao car cas cau cba cbb cbc cbe cbg cbi cbo cbr cbs cbu cca ccb ccc cce ccg cci cco ccr ccs ccu ce- cea ceb cec cee ceg cei ceo cer ces ceu cga cgb cgc cge cgg cgi cgo cgr cgs cgu ci- cia cib cic cie cig cii cio cir cis ciu co- coa cob coc coe cog coi coo cor cos cou cra crb crc cre crg cri cro crr crs cru csa csb csc cse csg csi cso csr css csu cua cub cuc cue cug cui cuo cur cus cuu eaa eab eac eae eag eai eao ear eas eau eba ebb ebc ebe ebg ebi ebo ebr ebs ebu ec- eca ecb ecc ece ecg eci eco ecr ecs ecu eea eeb eec eee eeg eeo eer ees ega egb egc ege egg egi ego egr egs egu eia eib eic eie eig eii eio eir eis eiu eo- eoa eob eoc eoe eog eoi eoo eor eos eou era erb erc ere erg eri ero err ers eru es- esa esb esc ese esg esi eso esr ess esu eu- eua eub euc eue eug eui eur eus gaa gab gac gae gag gai gao gar gas gau gba gbc gbe gbg gbi gbo gbr gbs gbu gca gcb gcc gce gcg gci gco gcr gcs gcu ge- gea geb gec gee geg gei geo ger ges geu gga ggb ggc ggg ggi ggo ggr ggs ggu gia gib gic gie gig gii gio gir gis giu goa gob goc goe gog goi goo gor gos gou gra grb grc gre grg gri gro grr grs gru gsa gsb gsc gse gsg gsi gso gsr gss gsu gu- gua gub guc gue gug gui guo gur gus guu ia- iaa iab iac iae iag iai iao iar ias iau iba ibb ibc ibe ibg ibi ibo ibr ibs ibu ica icb icc ice icg ici ico icr ics icu ie- iea iec iee ieg iei ier ies iga igb igc ige igg igi igo igr igs igu iia iib iic iie iii iio iir iis iiu io- ioa iob ioc ioe iog ioi ioo ior ios iou ir- ira irb irc ire irg iri iro irr irs iru is- isa isb isc ise isg isi iso isr iss isu iu- iua iub iuc iue iug iui iur ius o-i oaa oab oac oae oag oai oao oar oas oau ob- oba obb obc obe obg obi obo obr obs obu oc- oca ocb occ ocg oci oco ocr ocs ocu oea oeb oec oee oeg oei oeo oer oes oga ogc oge ogg ogi ogo ogs oia oib oic oie oii oio oir ois oiu oo- ooa oob ooc oog ooi ooo oor oos or- ora orb orc ore org ori oro orr ors oru os- osa osb osc ose osg osi oso osr oss osu ou- oua ouc oue oui ouo our ous ra- raa rab rac rae rag rai rao rar ras rau rba rbb rbc rbe rbg rbi rbo rbr rbs rbu rca rcb rcc rce rcg rci rco rcr rcs rcu re- rea reb rec ree reg rei reo rer res reu rga rgb rgc rge rgg rgi rgo rgr rgs ria rib ric rie rig rii rio rir ris roa rob roc roe rog roi roo ror ros rou rra rrb rrc rrg rri rrr rrs rru rsa rsb rsc rse rsg rsi rso rsr rss rsu rua rub ruc rue rug rui ruo rur rus ruu saa sab sac sae sag sai sao sar sas sau sba sbb sbc sbe sbg sbi sbo sbr sbs sbu sca scb scc sce scg sci sco scr scs scu se- sea seb sec see seg sei seo ser ses seu sga sgb sgc sge sgg sgi sgo sgr sgs sgu sia sib sic sie sig sii sio sir sis siu soa sob soc soe sog soi soo sor sos sou sr- sra srb src sre srg sri sro srr srs ss- ssa ssb ssc sse ssg ssi sso ssr sss ssu sua sub suc sue sug sui suo sur sus suu ua- uaa uab uac uae uag uai uao uar uas uau uba ubb ubc ube ubg ubi ubo ubr ubs ubu uca ucb ucc uce ucg uci uco ucr ucs ucu uea ueb uec uee ueg uei uer ues uga ugb ugc uge ugg ugi ugo ugr ugs ugu uia uib uic uie uig uii uio uir uis uiu uoa uob uoc uoe uog uoo uor uos ur- ura urb urc ure urg uri uro urr urs uru usa usb usc use usg usi uso usr