-er -ic a-a a-b a-c a-i a-t aaa aab aac aae aai aar aat aau ab- aba abb abc abe abi abr abt abu ac- aca acb acc ace aci acr act acu aea aeb aec aee aei aer aet aeu ai- aia aib aic aie aii air ait aiu ar- ara arb arc are ari arr art aru at- ata atb atc ate ati atr att atu au- aua aub auc aue aui aur aut b-u baa bab bac bae bai bar bat bau bba bbb bbc bbe bbi bbr bbt bbu bca bcb bcc bce bci bcr bct bcu be- bea beb bec bee bei ber bet beu bi- bia bib bic bie bii bir bit biu bra brb bre bri brr brt bru bta btb btc bte bti btr btt btu bua bub buc bue bui bur but buu c-- caa cab cac cae cai car cat cau cba cbb cbc cbe cbi cbr cbt cbu cca ccb ccc cce cci ccr cct ccu ce- cea ceb cec cee cei cer cet ceu ci- cia cib cic cie cii cir cit ciu cra crb crc cre cri crr crt cru cta ctb ctc cte cti ctr ctt ctu cua cub cuc cue cui cur cut cuu eaa eab eac eae eai ear eat eau eba ebb ebc ebe ebi ebr ebt ebu ec- eca ecb ecc ece eci ecr ect ecu eea eeb eec eee eer eet eia eib eic eie eii eir eit eiu era erb erc ere eri err ert eru eta etb etc ete eti 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 ibr ibt ibu ica icb icc ice ici icr ict icu ie- iea iec iee iei ier iet iia iib iic iie iii iir iit iiu ir- ira irb irc ire iri irr irt iru ita itb itc ite iti itt itu iu- iua iub iuc iue iui iur iut ra- raa rab rac rae rai rar rat rau rba rbb rbc rbe rbi rbr rbt rbu rca rcb rcc rce rci rcr rct rcu re- rea reb rec ree rei rer ret reu ria rib ric rie rii rir rit rra rrb rrc rri rrr rrt rru rta rtb rtc rte rti rtr rtt rtu rua rub ruc rue rui rur rut ruu taa tab tac tae tai tar tat tau tba tbb tbc tbe tbi tbr tbt tbu tca tcb tcc tce tci tcr tct tcu te- tea teb tec tee tei ter tet teu tia tib tic tie tii tir tit tiu tra trb trc tre tri trr trt tru tta ttb ttc tte tti ttr ttt ttu tua tub tuc tue tui tur tut tuu ua- uaa uab uac uae uai uar uat uau uba ubb ubc ube ubi ubr ubt ubu uca ucb ucc uce uci ucr uct ucu uea ueb uec uee uei uer uet uia uib uic uie uii uir uit uiu ur- ura urb urc ure uri urr urt uru uta utb utc ute uti utr utt utu uua uuc uue uur uut uuu