-al a-a a-b a-c aaa aab aac aae aal aav ab- aba abb abc abe abl abv ac- aca acb acc ace acl acv aea aeb aec aee ael aev al- ala alb alc ale all alv av- ava avb avc ave avl baa bab bac bae bal bav bba bbb bbc bbe bbl bca bcb bcc bce bcl bcv be- bea beb bec bee bel bev bla blb blc ble bll blv bva bvb bvc bve bvl bvv c-- caa cab cac cae cal cav cba cbb cbc cbe cbl cbv cca ccb ccc cce ccl ccv ce- cea ceb cec cee cel cev cl- cla clb clc cle cll clv cva cvb cvc cve cvl cvv eaa eab eac eae eal eav eba ebb ebc ebe ebl ebv ec- eca ecb ecc ece ecl ecv eea eeb eec eee eel eev ela elb elc ele ell elv eva evb evc eve evl evv la- laa lab lac lae lal lav lba lbb lbc lbe lbl lbv lca lcb lcc lce lcl lcv lea leb lec lee lel lev lla llb llc lle lll llv lva lvb lvc lve lvl lvv v-a v-e vaa vab vac vae val vav vba vbc vbl vbv vca vcc vce vcl vea veb vec vee vel vl- vla vlb vlc vle vll vlv vva vvb vvc vvv