-al a-a a-c a-t aaa aac aal aas aat ac- aca acc acl acs act al- ala alc all als alt as- asa asc asl ass ast at- ata atc atl ats att c-- caa cac cal cas cat cca ccc ccl ccs cct cl- cla clc cll cls clt csa csc csl css cst cta ctc ctl cts ctt la- laa lac lal las lat lca lcc lcl lcs lct lla llc lll lls llt lsa lsc lsl lss lst lta ltc ltl lts ltt saa sac sal sas sat sca scc scl scs sct sla slc sll sls slt ss- ssa ssc ssl sss sst sta stc stl sts stt taa tac tal tas tat tca tcc tcl tcs tct tla tlc tll tls tlt tsa tsc tsl tss tst tta ttc ttl tts ttt