-er -ic a-a a-b a-c a-i a-t aaa aab aac aae aag aai aao aar aas aat aau ab- aba abb abc abe abg abi abo abr abs abt abu ac- aca acb acc ace acg aci aco acr acs act acu aea aeb aec aee aeg aei aeo aer aes aet aeu ag- aga agb agc age agg agi ago agr ags agt agu ai- aia aib aic aie aig aii aio air ais ait aiu aoa aob aoc aoe aog aoi aoo aor aos aot aou ar- ara arb arc are arg ari aro arr ars art aru as- asa asb asc ase asg asi aso asr ass ast asu at- ata atb atc ate atg ati ato atr ats att atu au- aua aub auc aue aug aui auo aur aus aut b-u baa bab bac bae bag bai bao bar bas bat bau bba bbb bbc bbe bbg bbi bbo bbr bbs bbt bbu bca bcb bcc bce bcg bci bco bcr bcs bct bcu be- bea beb bec bee beg bei beo ber bes bet beu bga bgb bgc bge bgg bgi bgo bgr bgs bgt bgu bi- bia bib bic bie big bii bio bir bis bit biu boa bob boc boe bog boi boo bor bos bot bou bra brb bre brg bri bro brr brs brt bru bsa bsb bsc bse bsg bsi bso bsr bss bst bsu bta btb btc bte btg bti bto btr bts btt btu bua bub buc bue bug bui buo bur bus but buu c-- caa cab cac cae cag cai cao car cas cat cau cba cbb cbc cbe cbg cbi cbo cbr cbs cbt cbu cca ccb ccc cce ccg cci cco ccr ccs cct ccu ce- cea ceb cec cee ceg cei ceo cer ces cet ceu cga cgb cgc cge cgg cgi cgo cgr cgs cgt cgu ci- cia cib cic cie cig cii cio cir cis cit ciu co- coa cob coc coe cog coi coo cor cos cot cou cra crb crc cre crg cri cro crr crs crt cru csa csb csc cse csg csi cso csr css cst csu cta ctb ctc cte ctg cti cto ctr cts ctt ctu cua cub cuc cue cug cui cuo cur cus cut cuu eaa eab eac eae eag eai eao ear eas eat eau eba ebb ebc ebe ebg ebi ebo ebr ebs ebt ebu ec- eca ecb ecc ece ecg eci eco ecr ecs ect ecu eea eeb eec eee eeg eeo eer ees eet ega egb egc ege egg egi ego egr egs egt egu eia eib eic eie eig eii eio eir eis eit eiu eo- eoa eob eoc eoe eog eoi eoo eor eos eot eou era erb erc ere erg eri ero err ers ert eru es- esa esb esc ese esg esi eso esr ess est esu eta etb etc ete etg eti eto etr ets ett etu eu- eua eub euc eue eug eui eur eus eut gaa gab gac gae gag gai gao gar gas gat gau gba gbc gbe gbg gbi gbo gbr gbs gbt gbu gca gcb gcc gce gcg gci gco gcr gcs gct gcu ge- gea geb gec gee geg gei geo ger ges get geu gga ggb ggc ggg ggi ggo ggr ggs ggt ggu gia gib gic gie gig gii gio gir gis git giu goa gob goc goe gog goi goo gor gos got gou gra grb grc gre grg gri gro grr grs grt gru gsa gsb gsc gse gsg gsi gso gsr gss gst gsu gta gtb gtc gte gtg gti gto gtr gts gtt gtu gu- gua gub guc gue gug gui guo gur gus gut guu ia- iaa iab iac iae iag iai iao iar ias iat iau iba ibb ibc ibe ibg ibi ibo ibr ibs ibt ibu ica icb icc ice icg ici ico icr ics ict icu ie- iea iec iee ieg iei ier ies iet iga igb igc ige igg igi igo igr igs igt igu iia iib iic iie iii iio iir iis iit iiu io- ioa iob ioc ioe iog ioi ioo ior ios iot iou ir- ira irb irc ire irg iri iro irr irs irt iru is- isa isb isc ise isg isi iso isr iss ist isu ita itb itc ite itg iti ito its itt itu iu- iua iub iuc iue iug iui iur ius iut o-i oaa oab oac oae oag oai oao oar oas oat oau ob- oba obb obc obe obg obi obo obr obs obt obu oc- oca ocb occ ocg oci oco ocr ocs oct ocu oea oeb oec oee oeg oei oeo oer oes oet oga ogc oge ogg ogi ogo ogs ogt oia oib oic oie oii oio oir ois oit oiu oo- ooa oob ooc oog ooi ooo oor oos oot or- ora orb orc ore org ori oro orr ors ort oru os- osa osb osc ose osg osi oso osr oss ost osu ot- ota otb otc ote otg oti oto otr ots ott otu ou- oua ouc oue oui ouo our ous out ra- raa rab rac rae rag rai rao rar ras rat rau rba rbb rbc rbe rbg rbi rbo rbr rbs rbt rbu rca rcb rcc rce rcg rci rco rcr rcs rct rcu re- rea reb rec ree reg rei reo rer res ret reu rga rgb rgc rge rgg rgi rgo rgr rgs rgt ria rib ric rie rig rii rio rir ris rit roa rob roc roe rog roi roo ror ros rot rou rra rrb rrc rrg rri rrr rrs rrt rru rsa rsb rsc rse rsg rsi rso rsr rss rst rsu rta rtb rtc rte rtg rti rto rtr rts rtt rtu rua rub ruc rue rug rui ruo rur rus rut ruu saa sab sac sae sag sai sao sar sas sat sau sba sbb sbc sbe sbg sbi sbo