-er -ic a-a a-b a-c a-i aaa aab aac aad aae aai aar aas aau ab- aba abb abc abd abe abi abr abs abu ac- aca acb acc acd ace aci acr acs acu ad- ada adb adc add ade adi adr ads adu aea aeb aec aed aee aei aer aes aeu ai- aia aib aic aid aie aii air ais aiu ar- ara arb arc ard are ari arr ars aru as- asa asb asc asd ase asi asr ass asu au- aua aub auc aud aue aui aur aus b-u baa bab bac bad bae bai bar bas bau bba bbb bbc bbd bbe bbi bbr bbs bbu bca bcb bcc bcd bce bci bcr bcs bcu bda bdb bdc bdd bde bdi bdr bds bdu be- bea beb bec bed bee bei ber bes beu bi- bia bib bic bid bie bii bir bis biu bra brb brd bre bri brr brs bru bsa bsb bsc bsd bse bsi bsr bss bsu bua bub buc bud bue bui bur bus buu c-- caa cab cac cad cae cai car cas cau cba cbb cbc cbd cbe cbi cbr cbs cbu cca ccb ccc ccd cce cci ccr ccs ccu cda cdb cdc cdd cde cdi cdr cds cdu ce- cea ceb cec ced cee cei cer ces ceu ci- cia cib cic cid cie cii cir cis ciu cra crb crc crd cre cri crr crs cru csa csb csc csd cse csi csr css csu cua cub cuc cud cue cui cur cus cuu daa dab dac dad dae dai dar das dau dba dbb dbc dbd dbe dbi dbr dbs dbu dca dcb dcc dcd dce dci dcr dcs dcu dda ddb ddc ddd dde ddi ddr dds ddu de- dea deb dec ded dee dei der des deu di- dia dib dic did die dii dir dis diu dra drb drc drd dre dri drr drs dru dsa dsb dsc dsd dse dsi dsr dss dsu dua dub duc dud due dui dur dus eaa eab eac ead eae eai ear eas eau eba ebb ebc ebd ebe ebi ebr ebs ebu ec- eca ecb ecc ecd ece eci ecr ecs ecu ed- eda edb edc edd ede edi edr eds edu eea eeb eec eed eee eer ees eia eib eic eid eie eii eir eis eiu era erb erc erd ere eri err ers eru es- esa esb esc esd ese esi esr ess esu eu- eua eub euc eud eue eui eur eus i-d ia- iaa iab iac iad iae iai iar ias iau iba ibb ibc ibd ibe ibi ibr ibs ibu ica icb icc icd ice ici icr ics icu ida idb idc idd ide idi idr ids idu ie- iea iec ied iee iei ier ies iia iib iic iid iie iii iir iis iiu ir- ira irb irc ird ire iri irr irs iru is- isa isb isc isd ise isi isr iss isu iu- iua iub iuc iud iue iui iur ius ra- raa rab rac rad rae rai rar ras rau rba rbb rbc rbd rbe rbi rbr rbs rbu rca rcb rcc rcd rce rci rcr rcs rcu rda rdb rdc rdd rde rdi rdr rds rdu re- rea reb rec red ree rei rer res reu ria rib ric rid rie rii rir ris rra rrb rrc rrd rri rrr rrs rru rsa rsb rsc rsd rse rsi rsr rss rsu rua rub ruc rud rue rui rur rus ruu saa sab sac sad sae sai sar sas sau sba sbb sbc sbd sbe sbi sbr sbs sbu sca scb scc scd sce sci scr scs scu sda sdb sdc sdd sde sdi sdr sds sdu se- sea seb sec sed see sei ser ses seu sia sib sic sid sie sii sir sis siu sr- sra srb src srd sre sri srr srs ss- ssa ssb ssc ssd sse ssi ssr sss ssu sua sub suc sud sue sui sur sus suu ua- uaa uab uac uad uae uai uar uas uau uba ubb ubc ube ubi ubr ubs ubu uca ucb ucc ucd uce uci ucr ucs ucu uda udb udc udd ude udi udr uds udu uea ueb uec ued uee uei uer ues uia uib uic uid uie uii uir uis uiu ur- ura urb urc urd ure uri urr urs uru usa usb usc usd use usi usr uss usu uua uuc uue uur uus uuu