a-a aaa aad aak aao aap aar aas ad- ada add adk ado adp adr ads aka akd akk ako akp akr aks aoa aod aok aoo aop aor aos ap- apa apd apk apo app apr aps ar- ara ard ark aro arp arr ars as- asa asd ask aso asp asr ass daa dad dak dao dap dar das dda ddd ddk ddo ddp ddr dds dka dkk dko dkp dkr dks doa dod dok doo dop dor dos dpa dpd dpk dpo dpp dpr dps dra drd drk dro drp drr drs dsa dsd dsk dso dsp dsr dss ka- kaa kad kak kao kap kar kas kda kdk kdo kdp kdr kds kkk kkp kkr kks koa kod kok koo kop kor kos kpa kpd kpk kpo kpp kpr kps kra krd krk kro krp krr krs ksa ksd ksk kso ksp ksr kss oaa oad oak oao oap oar oas oda odd odo odp odr ods oka okd okk oko okp okr oks oo- ooa ood ook ooo oop oor oos op- opa opd opk opo opp opr ops or- ora ord ork oro orp orr ors os- osa osd osk oso osp osr oss p-p paa pad pak pao pap par pas pda pdd pdk pdo pdp pdr pds pka pkd pko pkp pkr pks poa pod pok poo pop por pos ppa ppd ppk ppo ppp ppr pps pra prd prk pro prp prr prs ps- psa psd psk pso psp psr pss ra- raa rad rak rao rap rar ras rda rdd rdo rdp rdr rds rkk rko rkp rks roa rod rok roo rop ror ros rpa rpd rpk rpo rpp rpr rps rra rrd rrk rrp rrr rrs rsa rsd rsk rso rsp rsr rss saa sad sak sao sap sar sas sda sdd sdk sdo sdp sdr sds sk- ska skd skk sko skp skr sks soa sod sok soo sop sor sos spa spd spk spo spp spr sps sr- sra srd srk sro srp srr srs ss- ssa ssd ssk sso ssp ssr sss