a-a aaa aad aak aao aap aas ad- ada add adk ado adp ads aka akd akk ako akp aks aoa aod aok aoo aop aos ap- apa apd apk apo app aps as- asa asd ask aso asp ass daa dad dak dao dap das dda ddd ddk ddo ddp dds dka dkk dko dkp dks doa dod dok doo dop dos dpa dpd dpk dpo dpp dps dsa dsd dsk dso dsp dss ka- kaa kad kak kao kap kas kda kdk kdo kdp kds kkk kkp kks koa kod kok koo kop kos kpa kpd kpk kpo kpp kps ksa ksd ksk kso ksp kss oaa oad oak oao oap oas oda odd odo odp ods oka okd okk oko okp oks oo- ooa ood ook ooo oop oos op- opa opd opk opo opp ops os- osa osd osk oso osp oss p-p paa pad pak pao pap pas pda pdd pdk pdo pdp pds pka pkd pko pkp pks poa pod pok poo pop pos ppa ppd ppk ppo ppp pps ps- psa psd psk pso psp pss saa sad sak sao sap sas sda sdd sdk sdo sdp sds sk- ska skd skk sko skp sks soa sod sok soo sop sos spa spd spk spo spp sps ss- ssa ssd ssk sso ssp sss