a-a aaa aad aap aar aas ad- ada add adp adr ads ap- apa apd app apr aps ar- ara ard arp arr ars as- asa asd asp asr ass daa dad dap dar das dda ddd ddp ddr dds dpa dpd dpp dpr dps dra drd drp drr drs dsa dsd dsp dsr dss p-p paa pad pap par pas pda pdd pdp pdr pds ppa ppd ppp ppr pps pra prd prp prr prs ps- psa psd psp psr pss ra- raa rad rap rar ras rda rdd rdp rdr rds rpa rpd rpp rpr rps rra rrd rrp rrr rrs rsa rsd rsp rsr rss saa sad sap sar sas sda sdd sdp sdr sds spa spd spp spr sps sr- sra srd srp srr srs ss- ssa ssd ssp ssr sss