-al a-a a-b a-c aaa aab aac aal aau aav ab- aba abb abc abl abu abv ac- aca acb acc acl acu acv al- ala alb alc all alu alv au- aua aub auc aul auv av- ava avb avc avl avu b-u baa bab bac bal bau bav bba bbb bbc bbl bbu bca bcb bcc bcl bcu bcv bla blb blc bll blu blv bua bub buc bul buu bva bvb bvc bvl bvu bvv c-- caa cab cac cal cau cav cba cbb cbc cbl cbu cbv cca ccb ccc ccl ccu ccv cl- cla clb clc cll clu clv cua cub cuc cul cuu cuv cva cvb cvc cvl cvu cvv la- laa lab lac lal lau lav lba lbb lbc lbl lbu lbv lca lcb lcc lcl lcu lcv lla llb llc lll llu llv lua lub luc lul luu luv lva lvb lvc lvl lvv ua- uaa uab uac ual uau uav uba ubb ubc ubl ubu ubv uca ucb ucc ucl ucu ucv ula ulb ulc ull ulu ulv uua uuc uuu uva uvb uvc uvl uvu uvv v-a vaa vab vac val vau vav vba vbc vbl vbv vca vcc vcl vcu vl- vla vlb vlc vll vlv vul vuv vva vvb vvc vvv