-er a-a a-b a-c a-t aaa aab aac aad aae aak aao aar aat aav ab- aba abb abc abd abe abk abo abr abt abv ac- aca acb acc acd ace ack aco acr act acv ad- ada adb adc add ade adk ado adr adt adv aea aeb aec aed aee aek aeo aer aet aev aka akb akc akd ake akk ako akr akv aoa aob aoc aod aoe aok aoo aor aot aov ar- ara arb arc ard are ark aro arr art arv at- ata atb atc atd ate ato atr att atv av- ava avb avc avd ave avk avo avr avt baa bab bac bad bae bak bao bar bat bav bba bbb bbc bbd bbe bbk bbo bbr bbt bca bcb bcc bcd bce bck bco bcr bct bcv bda bdb bdc bdd bde bdk bdo bdr bdt bdv be- bea beb bec bed bee bek beo ber bet bev bka bkb bkc bke bkk bko bkr bkt bkv boa bob boc bod boe bok boo bor bot bov bra brb brd bre brk bro brr brt brv bta btb btc btd bte btk bto btr btt btv bva bvb bvc bvd bve bvk bvo bvr bvt bvv c-- caa cab cac cad cae cak cao car cat cav cba cbb cbc cbd cbe cbk cbo cbr cbt cbv cca ccb ccc ccd cce cck cco ccr cct ccv cda cdb cdc cdd cde cdk cdo cdr cdt cdv ce- cea ceb cec ced cee cek ceo cer cet cev cka ckb ckc ckd cko ckt co- coa cob coc cod coe cok coo cor cot cov cra crb crc crd cre crk cro crr crt crv cta ctb ctc ctd cte ctk cto ctr ctt ctv cva cvb cvc cvd cve cvk cvo cvr cvt cvv daa dab dac dad dae dak dao dar dat dav dba dbb dbc dbd dbe dbk dbo dbr dbt dbv dca dcb dcc dcd dce dck dco dcr dct dcv dda ddb ddc ddd dde ddk ddo ddr ddt de- dea deb dec ded dee dek deo der det dev dka dkb dkc dke dkk dko dkr dkt doa dob doc dod doe dok doo dor dot dov dra drb drc drd dre drk dro drr drt drv dta dtb dtc dtd dte dtk dto dtr dtt dtv dva dvb dvc dvd dve dvk dvr dvt eaa eab eac ead eae eak eao ear eat eav eba ebb ebc ebd ebe ebk ebo ebr ebt ebv ec- eca ecb ecc ecd ece eck eco ecr ect ecv ed- eda edb edc edd ede edk edo edr edt eea eeb eec eed eee eek eeo eer eet eev eka ekb ekc ekd eke eko ekr ekt ekv eo- eoa eob eoc eod eoe eok eoo eor eot era erb erc erd ere erk ero err ert erv eta etb etc etd ete etk eto etr ett etv eva evb evc evd eve evo evr evt evv k-t ka- kaa kab kac kad kae kak kao kar kat kav kba kbb kbc kbd kbe kbk kbo kbr kca kcb kcc kcd kce kck kcr kct kda kdb kdc kde kdk kdo kdr kdt ke- kea keb kec ked kee kek keo ker ket kev kkb kkc kke kkk kkr kkt kkv koa kob koc kod koe kok koo kor kot kra krc krd krk kro krr krt krv kta ktb ktc kte ktk kto ktr ktt ktv kva kvb kvk kvo kvr kvv oaa oab oac oad oae oak oao oar oat oav ob- oba obb obc obd obe obk obo obr obt obv oc- oca ocb occ ocd ock oco ocr oct ocv oda odb odc odd ode odo odr odt odv oea oeb oec oed oee oeo oer oet oka okb okc okd oke okk oko okr oo- ooa oob ooc ood ook ooo oor oot oov or- ora orb orc ord ore ork oro orr ort orv ot- ota otb otc otd ote otk oto otr ott otv ov- ova ovb ovc ovd ove ovo ovv ra- raa rab rac rad rae rak rao rar rat rav rba rbb rbc rbd rbe rbk rbo rbr rbt rca rcb rcc rcd rce rco rcr rct rcv rda rdb rdc rdd rde rdo rdr rdt rdv re- rea reb rec red ree rek reo rer ret rev rkb rkc rke rkk rko rkt rkv roa rob roc rod roe rok roo ror rot rov rra rrb rrc rrd rrk rrr rrt rta rtb rtc rtd rte rtk rto rtr rtt rtv rva rvb rvc rvd rve rvo rvr rvt rvv taa tab tac tad tae tak tao tar tat tav tba tbb tbc tbd tbe tbk tbo tbr tbt tbv tca tcb tcc tcd tce tck tco tcr tct tcv tda tdb tdc tdd tde tdk tdo tdr tdt tdv te- tea teb tec ted tee tek teo ter tet tev tka tkb tkc tke tkk tko tkr tkt to- toa tob toc tod toe tok too tor tot tov tra trb trc trd tre trk tro trr trt trv tta ttb ttc ttd tte ttk tto ttr ttt ttv tva tvb tvc tvd tve tvk tvo tvr tvt v-a v-e vaa vab vac vad vae vak vao var vat vav vba vbc vbd vbk vbo vbr vbv vca vcc vcd vce vco vcr vct vdb vdc vdd vde vdk vdo vdr vdt vdv vea veb vec ved vee vek veo ver vet vka vkb vkt voa vob voc vod voe vok voo vor vot vov vra vrb vrc vrd vre vrk vrr vrt vta vtb vtc vte vtk vto vtr vtt vtv vva vvb vvc vvo vvr vvt vvv

-vac a-ak a-be a-do a-ok aaaa aaab aaac aaad aaae aaar aaav aaba aabb aabc aabd aabt aaca aacb aacc aacd aace aack aaco aacr aact aacv aada aadc aade aadt aaea aaec aaev aaka aake aaoe aaoo aara aarc aard aare aaro aart aata aatc