a-a aaa aad aaf aak aao aap aar aas ad- ada add adf adk ado adp adr ads af- afa afd aff afk afo afp afr afs aka akd akk ako akp akr aks aoa aod aof aok aoo aop aor aos ap- apa apd apf apk apo app apr aps ar- ara ard arf ark aro arp arr ars as- asa asd asf ask aso asp asr ass daa dad daf dak dao dap dar das dda ddd ddf ddk ddo ddp ddr dds dfa dfd dff dfk dfo dfp dfr dfs dka dkk dko dkp dkr dks doa dod dof dok doo dop dor dos dpa dpd dpf dpk dpo dpp dpr dps dra drd drk dro drp drr drs dsa dsd dsf dsk dso dsp dsr dss faa fad faf fak fao fap far fas fda fdd fdf fdk fdo fdp fdr fds ffa ffd fff ffk ffo ffp ffr ffs fka fkf fkk fkp foa fof fok foo fop for fos fpa fpd fpk fpo fpp fpr fps fra frd frf frk fro frp frr frs fsa fsd fsf fsk fso fsp fsr fss ka- kaa kad kaf kak kao kap kar kas kda kdf kdk kdo kdp kdr kds kfa kfd kff kfo kfs kkk kkp kkr kks koa kod kof kok koo kop kor kos kpa kpd kpf kpk kpo kpp kpr kps kra krd krf krk kro krp krr krs ksa ksd ksf ksk kso ksp ksr kss oaa oad oaf oak oao oap oar oas oda odd odf odo odp odr ods of- ofa ofd off ofo ofp ofr ofs oka okd okk oko okp okr oks oo- ooa ood oof ook ooo oop oor oos op- opa opd opf opk opo opp opr ops or- ora ord orf ork oro orp orr ors os- osa osd osf osk oso osp osr oss p-p paa pad paf pak pao pap par pas pda pdd pdf pdk pdo pdp pdr pds pfa pfd pff pfk pfo pfp pfr pfs pka pkd pkf pko pkp pkr pks poa pod pof pok poo pop por pos ppa ppd ppf ppk ppo ppp ppr pps pra prd prf prk pro prp prr prs ps- psa psd psf psk pso psp psr pss ra- raa rad raf rak rao rap rar ras rda rdd rdf rdo rdp rdr rds rfa rfd rff rfk rfo rfp rfr rfs rkf rkk rko rkp rks roa rod rof rok roo rop ror ros rpa rpd rpf rpk rpo rpp rpr rps rra rrd rrf rrk rrp rrr rrs rsa rsd rsf rsk rso rsp rsr rss saa sad saf sak sao sap sar sas sda sdd sdf sdk sdo sdp sdr sds sfa sfd sff sfk sfo sfp sfr sfs sk- ska skd skf skk sko skp skr sks soa sod sof sok soo sop sor sos spa spd spf spk spo spp spr sps sr- sra srd srf srk sro srp srr srs ss- ssa ssd ssf ssk sso ssp ssr sss