-al -ol a-a a-c a-t aaa aac aal aao aas aat ac- aca acc acl aco acs act al- ala alc all alo als alt aoa aoc aol aoo aos aot as- asa asc asl aso ass ast at- ata atc atl ato ats att c-- caa cac cal cao cas cat cca ccc ccl cco ccs cct cl- cla clc cll clo cls clt co- coa coc col coo cos cot csa csc csl cso css cst cta ctc ctl cto cts ctt la- laa lac lal lao las lat lca lcc lcl lco lcs lct lla llc lll llo lls llt loa loc lol loo los lot lsa lsc lsl lso lss lst lta ltc ltl lto lts ltt oaa oac oal oao oas oat oc- oca occ ocl oco ocs oct ola olc oll olo ols olt oo- ooa ooc ool ooo oos oot os- osa osc osl oso oss ost ot- ota otc otl oto ots ott saa sac sal sao sas sat sca scc scl sco scs sct sla slc sll slo sls slt soa soc sol soo sos sot ss- ssa ssc ssl sso sss sst sta stc stl sto sts stt taa tac tal tao tas tat tca tcc tcl tco tcs tct tla tlc tll tlo tls tlt to- toa toc tol too tos tot tsa tsc tsl tso tss tst tta ttc ttl tto tts ttt