-er -ic a-a a-b a-c a-i a-t aaa aab aac aae aai aak aar aat aau ab- aba abb abc abe abi abk abr abt abu ac- aca acb acc ace aci ack acr act acu aea aeb aec aee aei aek aer aet aeu ai- aia aib aic aie aii aik air ait aiu aka akb akc ake aki akk akr aku ar- ara arb arc are ari ark arr art aru at- ata atb atc ate ati atr att atu au- aua aub auc aue aui auk aur aut b-u baa bab bac bae bai bak bar bat bau bba bbb bbc bbe bbi bbk bbr bbt bbu bca bcb bcc bce bci bck bcr bct bcu be- bea beb bec bee bei bek ber bet beu bi- bia bib bic bie bii bik bir bit biu bka bkb bkc bke bkk bkr bkt bra brb bre bri brk brr brt bru bta btb btc bte bti btk btr btt btu bua bub buc bue bui buk bur but buu c-- caa cab cac cae cai cak car cat cau cba cbb cbc cbe cbi cbk cbr cbt cbu cca ccb ccc cce cci cck ccr cct ccu ce- cea ceb cec cee cei cek cer cet ceu ci- cia cib cic cie cii cik cir cit ciu cka ckb ckc cki ckt cra crb crc cre cri crk crr crt cru cta ctb ctc cte cti ctk ctr ctt ctu cua cub cuc cue cui cuk cur cut cuu eaa eab eac eae eai eak ear eat eau eba ebb ebc ebe ebi ebk ebr ebt ebu ec- eca ecb ecc ece eci eck ecr ect ecu eea eeb eec eee eek eer eet eia eib eic eie eii eik eir eit eiu eka ekb ekc eke eki ekr ekt eku era erb erc ere eri erk err ert eru eta etb etc ete eti etk etr ett etu eu- eua eub euc eue eui eur eut ia- iaa iab iac iae iai iar iat iau iba ibb ibc ibe ibi ibk ibr ibt ibu ica icb icc ice ici ick icr ict icu ie- iea iec iee iei iek ier iet iia iib iic iie iii iir iit iiu ika ikb ikc ike iki ikk ikr ikt iku ir- ira irb irc ire iri irk irr irt iru ita itb itc ite iti itk itt itu iu- iua iub iuc iue iui iur iut k-t ka- kaa kab kac kae kai kak kar kat kau kba kbb kbc kbe kbi kbk kbr kbu kca kcb kcc kce kci kck kcr kct kcu ke- kea keb kec kee kei kek ker ket kia kib kic kie kii kik kir kit kiu kkb kkc kke kki kkk kkr kkt kku kra krc kri krk krr krt kru kta ktb ktc kte ktk ktr ktt ktu kub kuc kue kui kuk kur kut kuu ra- raa rab rac rae rai rak rar rat rau rba rbb rbc rbe rbi rbk rbr rbt rbu rca rcb rcc rce rci rcr rct rcu re- rea reb rec ree rei rek rer ret reu ria rib ric rie rii rik rir rit rkb rkc rke rkk rkt rku rra rrb rrc rri rrk rrr rrt rru rta rtb rtc rte rti rtk rtr rtt rtu rua rub ruc rue rui ruk rur rut ruu taa tab tac tae tai tak tar tat tau tba tbb tbc tbe tbi tbk tbr tbt tbu tca tcb tcc tce tci tck tcr tct tcu te- tea teb tec tee tei tek ter tet teu tia tib tic tie tii tik tir tit tiu tka tkb tkc tke tkk tkr tkt tra trb trc tre tri trk trr trt tru tta ttb ttc tte tti ttk ttr ttt ttu tua tub tuc tue tui tuk tur tut tuu ua- uaa uab uac uae uai uak uar uat uau uba ubb ubc ube ubi ubk ubr ubt ubu uca ucb ucc uce uci uck ucr uct ucu uea ueb uec uee uei uer uet uia uib uic uie uii uir uit uiu uka ukb ukc uke uki ukk ukr uku ur- ura urb urc ure uri urk urr urt uru uta utb utc ute uti utk utr utt utu uua uuc uue uur uut uuu