a-a a-c a-z aaa aac aad aar aas aaz ac- aca acc acd acr acs acz ad- ada adc add adr ads adz ar- ara arc ard arr ars arz as- asa asc asd asr ass asz az- aza azd azs azz c-- caa cac cad car cas caz cca ccc ccd ccr ccs ccz cda cdc cdd cdr cds cdz cra crc crd crr crs crz csa csc csd csr css csz cz- czc czd daa dac dad dar das daz dca dcc dcd dcr dcs dda ddc ddd ddr dds ddz dra drc drd drr drs drz dsa dsc dsd dsr dss dsz dza dzd dzr dzs ra- raa rac rad rar ras raz rca rcc rcd rcr rcs rda rdc rdd rdr rds rra rrc rrd rrr rrs rsa rsc rsd rsr rss rza saa sac sad sar sas saz sca scc scd scr scs sda sdc sdd sdr sds sdz sr- sra src srd srr srs ss- ssa ssc ssd ssr sss ssz sza szd szr zaa zac zad zar zas zaz zcs zds zrs zsa zsz zzr zzs zzz