-al a-a a-c a-t aaa aac aad aal aas aat ac- aca acc acd acl acs act ad- ada adc add adl ads adt al- ala alc ald all als alt as- asa asc asd asl ass ast at- ata atc atd atl ats att c-- caa cac cad cal cas cat cca ccc ccd ccl ccs cct cda cdc cdd cdl cds cdt cl- cla clc cld cll cls clt csa csc csd csl css cst cta ctc ctd ctl cts ctt daa dac dad dal das dat dca dcc dcd dcl dcs dct dda ddc ddd ddl dds ddt dl- dla dlc dld dll dls dlt dsa dsc dsd dsl dss dst dta dtc dtd dtl dts dtt la- laa lac lad lal las lat lca lcc lcd lcl lcs lct lda ldc ldd ldl lds ldt lla llc lld lll lls llt lsa lsc lsd lsl lss lst lta ltc ltd ltl lts ltt saa sac sad sal sas sat sca scc scd scl scs sct sda sdc sdd sdl sds sdt sla slc sld sll sls slt ss- ssa ssc ssd ssl sss sst sta stc std stl sts stt taa tac tad tal tas tat tca tcc tcd tcl tcs tct tda tdc tdd tdl tds tdt tla tlc tld tll tls tlt tsa tsc tsd tsl tss tst tta ttc ttd ttl tts ttt