-er -ic a-a a-b a-c a-i a-t aaa aab aac aae aai aak aar aas aat aau ab- aba abb abc abe abi abk abr abs abt abu ac- aca acb acc ace aci ack acr acs act acu aea aeb aec aee aei aek aer aes aet aeu ai- aia aib aic aie aii aik air ais ait aiu aka akb akc ake aki akk akr aks aku ar- ara arb arc are ari ark arr ars art aru as- asa asb asc ase asi ask asr ass ast asu at- ata atb atc ate ati atr ats att atu au- aua aub auc aue aui auk aur aus aut b-u baa bab bac bae bai bak bar bas bat bau bba bbb bbc bbe bbi bbk bbr bbs bbt bbu bca bcb bcc bce bci bck bcr bcs bct bcu be- bea beb bec bee bei bek ber bes bet beu bi- bia bib bic bie bii bik bir bis bit biu bka bkb bkc bke bkk bkr bks bkt bra brb bre bri brk brr brs brt bru bsa bsb bsc bse bsi bsk bsr bss bst bsu bta btb btc bte bti btk btr bts btt btu bua bub buc bue bui buk bur bus but buu c-- caa cab cac cae cai cak car cas cat cau cba cbb cbc cbe cbi cbk cbr cbs cbt cbu cca ccb ccc cce cci cck ccr ccs cct ccu ce- cea ceb cec cee cei cek cer ces cet ceu ci- cia cib cic cie cii cik cir cis cit ciu cka ckb ckc cki cks ckt cra crb crc cre cri crk crr crs crt cru csa csb csc cse csi csk csr css cst csu cta ctb ctc cte cti ctk ctr cts ctt ctu cua cub cuc cue cui cuk cur cus cut cuu eaa eab eac eae eai eak ear eas eat eau eba ebb ebc ebe ebi ebk ebr ebs ebt ebu ec- eca ecb ecc ece eci eck ecr ecs ect ecu eea eeb eec eee eek eer ees eet eia eib eic eie eii eik eir eis eit eiu eka ekb ekc eke eki ekr eks ekt eku era erb erc ere eri erk err ers ert eru es- esa esb esc ese esi esk esr ess est esu eta etb etc ete eti etk etr ets ett etu eu- eua eub euc eue eui eur eus eut ia- iaa iab iac iae iai iar ias iat iau iba ibb ibc ibe ibi ibk ibr ibs ibt ibu ica icb icc ice ici ick icr ics ict icu ie- iea iec iee iei iek ier ies iet iia iib iic iie iii iir iis iit iiu ika ikb ikc ike iki ikk ikr iks ikt iku ir- ira irb irc ire iri irk irr irs irt iru is- isa isb isc ise isi isk isr iss ist isu ita itb itc ite iti itk its itt itu iu- iua iub iuc iue iui iur ius iut k-t ka- kaa kab kac kae kai kak kar kas kat kau kba kbb kbc kbe kbi kbk kbr kbs kbu kca kcb kcc kce kci kck kcr kcs kct kcu ke- kea keb kec kee kei kek ker kes ket kia kib kic kie kii kik kir kis kit kiu kkb kkc kke kki kkk kkr kks kkt kku kra krc kri krk krr krs krt kru ksa ksb ksc kse ksi ksk ksr kss kst ksu kta ktb ktc kte ktk ktr kts ktt ktu kub kuc kue kui kuk kur kus kut kuu ra- raa rab rac rae rai rak rar ras rat rau rba rbb rbc rbe rbi rbk rbr rbs rbt rbu rca rcb rcc rce rci rcr rcs rct rcu re- rea reb rec ree rei rek rer res ret reu ria rib ric rie rii rik rir ris rit rkb rkc rke rkk rks rkt rku rra rrb rrc rri rrk rrr rrs rrt rru rsa rsb rsc rse rsi rsk rsr rss rst rsu rta rtb rtc rte rti rtk rtr rts rtt rtu rua rub ruc rue rui ruk rur rus rut ruu saa sab sac sae sai sak sar sas sat sau sba sbb sbc sbe sbi sbk sbr sbs sbt sbu sca scb scc sce sci sck scr scs sct scu se- sea seb sec see sei sek ser ses set seu sia sib sic sie sii sik sir sis sit siu sk- ska skb skc ske ski skk skr sks skt sku sr- sra srb src sre sri srk srr srs srt ss- ssa ssb ssc sse ssi ssk ssr sss sst ssu sta stb stc ste sti stk str sts stt stu sua sub suc sue sui suk sur sus sut suu taa tab tac tae tai tak tar tas tat tau tba tbb tbc tbe tbi tbk tbr tbs tbt tbu tca tcb tcc tce tci tck tcr tcs tct tcu te- tea teb tec tee tei tek ter tes tet teu tia tib tic tie tii tik tir tis tit tiu tka tkb tkc tke tkk tkr tks tkt tra trb trc tre tri trk trr trs trt tru tsa tsb tsc tse tsi tsk tsr tss tst tsu tta ttb ttc tte tti ttk ttr tts ttt ttu tua tub tuc tue tui tuk tur tus tut tuu ua- uaa uab uac uae uai uak uar uas uat uau uba ubb ubc ube ubi ubk ubr ubs ubt ubu uca ucb ucc uce uci uck ucr ucs uct ucu uea ueb uec uee uei uer ues uet uia uib uic uie uii uir uis uit uiu uka ukb ukc uke uki ukk ukr uku ur- ura urb urc ure uri urk urr urs urt uru usa usb usc use usi usk usr uss ust usu uta utb utc ute uti utk utr uts utt utu uua uuc uue uur uus uut uuu

-ase a-ak a-be a-ii aaaa aaab