-er -ic a-a a-b a-c a-i a-t aaa aab aac aae aai aar aat aav ab- aba abb abc abe abi abr abt abv ac- aca acb acc ace aci acr act acv aea aeb aec aee aei aer aet aev ai- aia aib aic aie aii air ait aiv ar- ara arb arc are ari arr art arv at- ata atb atc ate ati atr att atv av- ava avb avc ave avi avr avt baa bab bac bae bai bar bat bav bba bbb bbc bbe bbi bbr bbt bca bcb bcc bce bci bcr bct bcv be- bea beb bec bee bei ber bet bev bi- bia bib bic bie bii bir bit biv bra brb bre bri brr brt brv bta btb btc bte bti btr btt btv bva bvb bvc bve bvi bvr bvt bvv c-- caa cab cac cae cai car cat cav cba cbb cbc cbe cbi cbr cbt cbv cca ccb ccc cce cci ccr cct ccv ce- cea ceb cec cee cei cer cet cev ci- cia cib cic cie cii cir cit civ cra crb crc cre cri crr crt crv cta ctb ctc cte cti ctr ctt ctv cva cvb cvc cve cvi cvr cvt cvv eaa eab eac eae eai ear eat eav eba ebb ebc ebe ebi ebr ebt ebv ec- eca ecb ecc ece eci ecr ect ecv eea eeb eec eee eer eet eev eia eib eic eie eii eir eit eiv era erb erc ere eri err ert erv eta etb etc ete eti etr ett etv eva evb evc eve evi evr evt evv i-v ia- iaa iab iac iae iai iar iat iav iba ibb ibc ibe ibi ibr ibt ibv ica icb icc ice ici icr ict icv ie- iea iec iee iei ier iet iev iia iib iic iie iii iir iit ir- ira irb irc ire iri irr irt irv ita itb itc ite iti itt itv iva ivb ivc ive ivi ivr ivt ivv ra- raa rab rac rae rai rar rat rav rba rbb rbc rbe rbi rbr rbt rca rcb rcc rce rci rcr rct rcv re- rea reb rec ree rei rer ret rev ria rib ric rie rii rir rit riv rra rrb rrc rri rrr rrt rta rtb rtc rte rti rtr rtt rtv rva rvb rvc rve rvi rvr rvt rvv taa tab tac tae tai tar tat tav tba tbb tbc tbe tbi tbr tbt tbv tca tcb tcc tce tci tcr tct tcv te- tea teb tec tee tei ter tet tev tia tib tic tie tii tir tit tiv tra trb trc tre tri trr trt trv tta ttb ttc tte tti ttr ttt ttv tva tvb tvc tve tvi tvr tvt v-a v-e vaa vab vac vae vai var vat vav vba vbc vbi vbr vbv vca vcc vce vci vcr vct vea veb vec vee vei ver vet vi- via vib vic vie vii vir vit viv vra vrb vrc vre vri vrr vrt vta vtb vtc vte vti vtr vtt vtv vva vvb vvc vvi vvr vvt vvv