-al a-a a-b a-c a-t aaa aab aac aae aal aat aav ab- aba abb abc abe abl abt abv ac- aca acb acc ace acl act acv aea aeb aec aee ael aet aev al- ala alb alc ale all alt alv at- ata atb atc ate atl att atv av- ava avb avc ave avl avt baa bab bac bae bal bat bav bba bbb bbc bbe bbl bbt bca bcb bcc bce bcl bct bcv be- bea beb bec bee bel bet bev bla blb blc ble bll blt blv bta btb btc bte btl btt btv bva bvb bvc bve bvl bvt bvv c-- caa cab cac cae cal cat cav cba cbb cbc cbe cbl cbt cbv cca ccb ccc cce ccl cct ccv ce- cea ceb cec cee cel cet cev cl- cla clb clc cle cll clt clv cta ctb ctc cte ctl ctt ctv cva cvb cvc cve cvl cvt cvv eaa eab eac eae eal eat eav eba ebb ebc ebe ebl ebt ebv ec- eca ecb ecc ece ecl ect ecv eea eeb eec eee eel eet eev ela elb elc ele ell elt elv eta etb etc ete etl ett etv eva evb evc eve evl evt evv la- laa lab lac lae lal lat lav lba lbb lbc lbe lbl lbt lbv lca lcb lcc lce lcl lct lcv lea leb lec lee lel let lev lla llb llc lle lll llt llv lta ltb ltc lte ltl ltt ltv lva lvb lvc lve lvl lvt lvv taa tab tac tae tal tat tav tba tbb tbc tbe tbl tbt tbv tca tcb tcc tce tcl tct tcv te- tea teb tec tee tel tet tev tla tlc tle tll tlt tlv tta ttb ttc tte ttl ttt ttv tva tvb tvc tve tvl tvt v-a v-e vaa vab vac vae val vat vav vba vbc vbl vbv vca vcc vce vcl vct vea veb vec vee vel vet vl- vla vlb vlc vle vll vlt vlv vta vtb vtc vte vtl vtt vtv vva vvb vvc vvt vvv