-al a-a a-c a-t aaa aac aad aal aar aas aat ac- aca acc acd acl acr acs act ad- ada adc add adl adr ads adt al- ala alc ald all alr als alt ar- ara arc ard arl arr ars art as- asa asc asd asl asr ass ast at- ata atc atd atl atr ats att c-- caa cac cad cal car cas cat cca ccc ccd ccl ccr ccs cct cda cdc cdd cdl cdr cds cdt cl- cla clc cld cll clr cls clt cra crc crd crl crr crs crt csa csc csd csl csr css cst cta ctc ctd ctl ctr cts ctt daa dac dad dal dar das dat dca dcc dcd dcl dcr dcs dct dda ddc ddd ddl ddr dds ddt dl- dla dlc dld dll dlr dls dlt dra drc drd drl drr drs drt dsa dsc dsd dsl dsr dss dst dta dtc dtd dtl dtr dts dtt la- laa lac lad lal lar las lat lca lcc lcd lcl lcr lcs lct lda ldc ldd ldl ldr lds ldt lla llc lld lll llr lls llt lra lrc lrd lrr lrs lrt lsa lsc lsd lsl lsr lss lst lta ltc ltd ltl ltr lts ltt ra- raa rac rad ral rar ras rat rca rcc rcd rcl rcr rcs rct rda rdc rdd rdl rdr rds rdt rla rlc rld rll rlr rls rlt rra rrc rrd rrl rrr rrs rrt rsa rsc rsd rsl rsr rss rst rta rtc rtd rtl rtr rts rtt saa sac sad sal sar sas sat sca scc scd scl scr scs sct sda sdc sdd sdl sdr sds sdt sla slc sld sll slr sls slt sr- sra src srd srl srr srs srt ss- ssa ssc ssd ssl ssr sss sst sta stc std stl str sts stt taa tac tad tal tar tas tat tca tcc tcd tcl tcr tcs tct tda tdc tdd tdl tdr tds tdt tla tlc tld tll tlr tls tlt tra trc trd trl trr trs trt tsa tsc tsd tsl tsr tss tst tta ttc ttd ttl ttr tts ttt