-er -ic a-a a-b a-c a-i aaa aab aac aad aae aai aak aar aas aau ab- aba abb abc abd abe abi abk abr abs abu ac- aca acb acc acd ace aci ack acr acs acu ad- ada adb adc add ade adi adk adr ads adu aea aeb aec aed aee aei aek aer aes aeu ai- aia aib aic aid aie aii aik air ais aiu aka akb akc akd ake aki akk akr aks aku ar- ara arb arc ard are ari ark arr ars aru as- asa asb asc asd ase asi ask asr ass asu au- aua aub auc aud aue aui auk aur aus b-u baa bab bac bad bae bai bak bar bas bau bba bbb bbc bbd bbe bbi bbk bbr bbs bbu bca bcb bcc bcd bce bci bck bcr bcs bcu bda bdb bdc bdd bde bdi bdk bdr bds bdu be- bea beb bec bed bee bei bek ber bes beu bi- bia bib bic bid bie bii bik bir bis biu bka bkb bkc bke bkk bkr bks bra brb brd bre bri brk brr brs bru bsa bsb bsc bsd bse bsi bsk bsr bss bsu bua bub buc bud bue bui buk bur bus buu c-- caa cab cac cad cae cai cak car cas cau cba cbb cbc cbd cbe cbi cbk cbr cbs cbu cca ccb ccc ccd cce cci cck ccr ccs ccu cda cdb cdc cdd cde cdi cdk cdr cds cdu ce- cea ceb cec ced cee cei cek cer ces ceu ci- cia cib cic cid cie cii cik cir cis ciu cka ckb ckc ckd cki cks cra crb crc crd cre cri crk crr crs cru csa csb csc csd cse csi csk csr css csu cua cub cuc cud cue cui cuk cur cus cuu daa dab dac dad dae dai dak dar das dau dba dbb dbc dbd dbe dbi dbk dbr dbs dbu dca dcb dcc dcd dce dci dck dcr dcs dcu dda ddb ddc ddd dde ddi ddk ddr dds ddu de- dea deb dec ded dee dei dek der des deu di- dia dib dic did die dii dik dir dis diu dka dkb dkc dke dki dkk dkr dks dku dra drb drc drd dre dri drk drr drs dru dsa dsb dsc dsd dse dsi dsk dsr dss dsu dua dub duc dud due dui duk dur dus eaa eab eac ead eae eai eak ear eas eau eba ebb ebc ebd ebe ebi ebk ebr ebs ebu ec- eca ecb ecc ecd ece eci eck ecr ecs ecu ed- eda edb edc edd ede edi edk edr eds edu eea eeb eec eed eee eek eer ees eia eib eic eid eie eii eik eir eis eiu eka ekb ekc ekd eke eki ekr eks eku era erb erc erd ere eri erk err ers eru es- esa esb esc esd ese esi esk 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 ibk ibr ibs ibu ica icb icc icd ice ici ick icr ics icu ida idb idc idd ide idi idk idr ids idu ie- iea iec ied iee iei iek ier ies iia iib iic iid iie iii iir iis iiu ika ikb ikc ike iki ikk ikr iks iku ir- ira irb irc ird ire iri irk irr irs iru is- isa isb isc isd ise isi isk isr iss isu iu- iua iub iuc iud iue iui iur ius ka- kaa kab kac kad kae kai kak kar kas kau kba kbb kbc kbd kbe kbi kbk kbr kbs kbu kca kcb kcc kcd kce kci kck kcr kcs kcu kda kdb kdc kde kdk kdr kds kdu ke- kea keb kec ked kee kei kek ker kes kia kib kic kid kie kii kik kir kis kiu kkb kkc kke kki kkk kkr kks kku kra krc krd kri krk krr krs kru ksa ksb ksc ksd kse ksi ksk ksr kss ksu kub kuc kud kue kui kuk kur kus kuu ra- raa rab rac rad rae rai rak rar ras rau rba rbb rbc rbd rbe rbi rbk 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 rek rer res reu ria rib ric rid rie rii rik rir ris rkb rkc rke rkk rks rku rra rrb rrc rrd rri rrk rrr rrs rru rsa rsb rsc rsd rse rsi rsk rsr rss rsu rua rub ruc rud rue rui ruk rur rus ruu saa sab sac sad sae sai sak sar sas sau sba sbb sbc sbd sbe sbi sbk sbr sbs sbu sca scb scc scd sce sci sck scr scs scu sda sdb sdc sdd sde sdi sdk sdr sds sdu se- sea seb sec sed see sei sek ser ses seu sia sib sic sid sie sii sik sir sis siu sk- ska skb skc skd ske ski skk skr sks sku sr- sra srb src srd sre sri srk srr srs ss- ssa ssb ssc ssd sse ssi ssk ssr sss ssu sua sub suc sud sue sui suk sur sus suu ua- uaa uab uac uad uae uai uak uar uas uau uba ubb ubc ube ubi ubk ubr ubs ubu uca ucb ucc ucd uce uci uck ucr ucs ucu uda udb udc udd ude udi udk udr uds udu uea ueb uec ued uee uei uer ues uia uib uic uid uie uii uir uis uiu uka ukb ukc uke uki ukk ukr uku ur- ura urb urc urd ure uri urk urr urs uru usa usb usc usd use usi usk usr uss usu uua uuc uue uur uus uuu