a-a a-c aaa aac aad aan aar aas ac- aca acc acd acn acr acs ad- ada adc add adn adr ads an- ana anc and ann anr ans ar- ara arc ard arn arr ars as- asa asc asd asn asr ass c-- caa cac cad can car cas cca ccc ccd ccn ccr ccs cda cdc cdd cdn cdr cds cn- cna cnc cnd cnn cnr cns cra crc crd crn crr crs csa csc csd csn csr css daa dac dad dan dar das dca dcc dcd dcn dcr dcs dda ddc ddd ddn ddr dds dna dnc dnd dnn dnr dns dra drc drd drn drr drs dsa dsc dsd dsn dsr dss naa nac nad nan nar nas nca ncc ncd ncn ncr ncs nda ndc ndd ndn ndr nds nna nnc nnn nns nra nrc nrd nrn nrr nrs nsa nsc nsd nsn nsr nss ra- raa rac rad ran rar ras rca rcc rcd rcn rcr rcs rda rdc rdd rdn rdr rds rna rnc rnd rnn rnr rns rra rrc rrd rrn rrr rrs rsa rsc rsd rsn rsr rss saa sac sad san sar sas sca scc scd scn scr scs sda sdc sdd sdn sdr sds sna snc snd snn snr sns sr- sra src srd srn srr srs ss- ssa ssc ssd ssn ssr sss