a-a aaa aad aak aar aas ad- ada add adk adr ads aka akd akk akr aks ar- ara ard ark arr ars as- asa asd ask asr ass daa dad dak dar das dda ddd ddk ddr dds dka dkk dkr dks dra drd drk drr drs dsa dsd dsk dsr dss ka- kaa kad kak kar kas kda kdk kdr kds kkk kkr kks kra krd krk krr krs ksa ksd ksk ksr kss ra- raa rad rak rar ras rda rdd rdr rds rkk rks rra rrd rrk rrr rrs rsa rsd rsk rsr rss saa sad sak sar sas sda sdd sdk sdr sds sk- ska skd skk skr sks sr- sra srd srk srr srs ss- ssa ssd ssk ssr sss