-er -ic a-a a-b a-c a-i aaa aab aac aad aae aai aao aar aas aau ab- aba abb abc abd abe abi abo abr abs abu ac- aca acb acc acd ace aci aco acr acs acu ad- ada adb adc add ade adi ado adr ads adu aea aeb aec aed aee aei aeo aer aes aeu ai- aia aib aic aid aie aii aio air ais aiu aoa aob aoc aod aoe aoi aoo aor aos aou ar- ara arb arc ard are ari aro arr ars aru as- asa asb asc asd ase asi aso asr ass asu au- aua aub auc aud aue aui auo aur aus b-u baa bab bac bad bae bai bao bar bas bau bba bbb bbc bbd bbe bbi bbo bbr bbs bbu bca bcb bcc bcd bce bci bco bcr bcs bcu bda bdb bdc bdd bde bdi bdo bdr bds bdu be- bea beb bec bed bee bei beo ber bes beu bi- bia bib bic bid bie bii bio bir bis biu boa bob boc bod boe boi boo bor bos bou bra brb brd bre bri bro brr brs bru bsa bsb bsc bsd bse bsi bso bsr bss bsu bua bub buc bud bue bui buo bur bus buu c-- caa cab cac cad cae cai cao car cas cau cba cbb cbc cbd cbe cbi cbo cbr cbs cbu cca ccb ccc ccd cce cci cco ccr ccs ccu cda cdb cdc cdd cde cdi cdo cdr cds cdu ce- cea ceb cec ced cee cei ceo cer ces ceu ci- cia cib cic cid cie cii cio cir cis ciu co- coa cob coc cod coe coi coo cor cos cou cra crb crc crd cre cri cro crr crs cru csa csb csc csd cse csi cso csr css csu cua cub cuc cud cue cui cuo cur cus cuu daa dab dac dad dae dai dao dar das dau dba dbb dbc dbd dbe dbi dbo dbr dbs dbu dca dcb dcc dcd dce dci dco dcr dcs dcu dda ddb ddc ddd dde ddi ddo ddr dds ddu de- dea deb dec ded dee dei deo der des deu di- dia dib dic did die dii dio dir dis diu doa dob doc dod doe doi doo dor dos dou dra drb drc drd dre dri dro drr drs dru dsa dsb dsc dsd dse dsi dso dsr dss dsu dua dub duc dud due dui duo dur dus eaa eab eac ead eae eai eao ear eas eau eba ebb ebc ebd ebe ebi ebo ebr ebs ebu ec- eca ecb ecc ecd ece eci eco ecr ecs ecu ed- eda edb edc edd ede edi edo edr eds edu eea eeb eec eed eee eeo eer ees eia eib eic eid eie eii eio eir eis eiu eo- eoa eob eoc eod eoe eoi eoo eor eos eou era erb erc erd ere eri ero err ers eru es- esa esb esc esd ese esi eso esr ess esu eu- eua eub euc eud eue eui eur eus i-d ia- iaa iab iac iad iae iai iao iar ias iau iba ibb ibc ibd ibe ibi ibo ibr ibs ibu ica icb icc icd ice ici ico icr ics icu ida idb idc idd ide idi ido idr ids idu ie- iea iec ied iee iei ier ies iia iib iic iid iie iii iio iir iis iiu io- ioa iob ioc iod ioe ioi ioo ior ios iou ir- ira irb irc ird ire iri iro irr irs iru is- isa isb isc isd ise isi iso isr iss isu iu- iua iub iuc iud iue iui iur ius o-i oaa oab oac oad oae oai oao oar oas oau ob- oba obb obc obd obe obi obo obr obs obu oc- oca ocb occ ocd oci oco ocr ocs ocu oda odb odc odd ode odi odo odr ods odu oea oeb oec oed oee oei oeo oer oes oia oib oic oid oie oii oio oir ois oiu oo- ooa oob ooc ood ooi ooo oor oos or- ora orb orc ord ore ori oro orr ors oru os- osa osb osc osd ose osi oso osr oss osu ou- oua ouc oud oue oui ouo our ous ra- raa rab rac rad rae rai rao rar ras rau rba rbb rbc rbd rbe rbi rbo rbr rbs rbu rca rcb rcc rcd rce rci rco rcr rcs rcu rda rdb rdc rdd rde rdi rdo rdr rds rdu re- rea reb rec red ree rei reo rer res reu ria rib ric rid rie rii rio rir ris roa rob roc rod roe roi roo ror ros rou rra rrb rrc rrd rri rrr rrs rru rsa rsb rsc rsd rse rsi rso rsr rss rsu rua rub ruc rud rue rui ruo rur rus ruu saa sab sac sad sae sai sao sar sas sau sba sbb sbc sbd sbe sbi sbo sbr sbs sbu sca scb scc scd sce sci sco scr scs scu sda sdb sdc sdd sde sdi sdo sdr sds sdu se- sea seb sec sed see sei seo ser ses seu sia sib sic sid sie sii sio sir sis siu soa sob soc sod soe soi soo sor sos sou sr- sra srb src srd sre sri sro srr srs ss- ssa ssb ssc ssd sse ssi sso ssr sss ssu sua sub suc sud sue sui suo sur sus suu ua- uaa uab uac uad uae uai uao uar uas uau uba ubb ubc ube ubi ubo ubr ubs ubu uca ucb ucc ucd uce uci uco ucr ucs ucu uda udb udc udd ude udi udo udr uds udu uea ueb uec ued uee uei uer ues uia uib uic uid uie uii uio uir uis uiu uoa uob uoc uod uoe uoo uor uos ur- ura urb urc urd ure uri uro urr urs