-al a-a a-b a-c aaa aab aac aal aas aav ab- aba abb abc abl abs abv ac- aca acb acc acl acs acv al- ala alb alc all als alv as- asa asb asc asl ass asv av- ava avb avc avl avs baa bab bac bal bas bav bba bbb bbc bbl bbs bca bcb bcc bcl bcs bcv bla blb blc bll bls blv bsa bsb bsc bsl bss bsv bva bvb bvc bvl bvs bvv c-- caa cab cac cal cas cav cba cbb cbc cbl cbs cbv cca ccb ccc ccl ccs ccv cl- cla clb clc cll cls clv csa csb csc csl css csv cva cvb cvc cvl cvs cvv la- laa lab lac lal las lav lba lbb lbc lbl lbs lbv lca lcb lcc lcl lcs lcv lla llb llc lll lls llv lsa lsb lsc lsl lss lsv lva lvb lvc lvl lvs lvv saa sab sac sal sas sav sba sbb sbc sbl sbs sbv sca scb scc scl scs scv sla slb slc sll sls slv ss- ssa ssb ssc ssl sss ssv sva svb svc svl svs svv v-a vaa vab vac val vas vav vba vbc vbl vbs vbv vca vcc vcl vcs vl- vla vlb vlc vll vls vlv vsa vsb vsc vsl vss vsv vva vvb vvc vvs vvv