a-a a-c aaa aac aad aap aar aas ac- aca acc acd acp acr acs ad- ada adc add adp adr ads ap- apa apc apd app apr aps ar- ara arc ard arp arr ars as- asa asc asd asp asr ass c-- caa cac cad cap car cas cca ccc ccd ccp ccr ccs cda cdc cdd cdp cdr cds cpa cpc cpd cpp cpr cps cra crc crd crp crr crs csa csc csd csp csr css daa dac dad dap dar das dca dcc dcd dcp dcr dcs dda ddc ddd ddp ddr dds dpa dpc dpd dpp dpr dps dra drc drd drp drr drs dsa dsc dsd dsp dsr dss p-p paa pac pad pap par pas pca pcc pcd pcp pcr pcs pda pdc pdd pdp pdr pds ppa ppc ppd ppp ppr pps pra prc prd prp prr prs ps- psa psc psd psp psr pss ra- raa rac rad rap rar ras rca rcc rcd rcp rcr rcs rda rdc rdd rdp rdr rds rpa rpc rpd rpp rpr rps rra rrc rrd rrp rrr rrs rsa rsc rsd rsp rsr rss saa sac sad sap sar sas sca scc scd scp scr scs sda sdc sdd sdp sdr sds spa spc spd spp spr sps sr- sra src srd srp srr srs ss- ssa ssc ssd ssp ssr sss