a-a a-c a-t a-z aaa aac aar aas aat aaz ac- aca acc acr acs act acz ar- ara arc arr ars art arz as- asa asc asr ass ast asz at- ata atc atr ats att atz az- aza azs azt azz c-- caa cac car cas cat caz cca ccc ccr ccs cct ccz cra crc crr crs crt crz csa csc csr css cst csz cta ctc ctr cts ctt ctz cz- czc czt ra- raa rac rar ras rat raz rca rcc rcr rcs rct rra rrc rrr rrs rrt rsa rsc rsr rss rst rta rtc rtr rts rtt rtz rza saa sac sar sas sat saz sca scc scr scs sct sr- sra src srr srs srt ss- ssa ssc ssr sss sst ssz sta stc str sts stt stz sza szr taa tac tar tas tat taz tca tcc tcr tcs tct tra trc trr trs trt trz tsa tsc tsr tss tst tta ttc ttr tts ttt tza tzs zaa zac zar zas zat zaz zcs zrs zsa zst zsz zta ztr zzr zzs zzt zzz