a-a aaa aad aan aao aap aas ad- ada add adn ado adp ads an- ana and ann ano anp ans aoa aod aon aoo aop aos ap- apa apd apn apo app aps as- asa asd asn aso asp ass daa dad dan dao dap das dda ddd ddn ddo ddp dds dna dnd dnn dno dnp dns doa dod don doo dop dos dpa dpd dpn dpo dpp dps dsa dsd dsn dso dsp dss naa nad nan nao nap nas nda ndd ndn ndo ndp nds nna nnn nno nnp nns no- noa nod non noo nop nos npa npd npn npo npp nps nsa nsd nsn nso nsp nss oaa oad oan oao oap oas oda odd odn odo odp ods on- ona ond onn ono onp ons oo- ooa ood oon ooo oop oos op- opa opd opn opo opp ops os- osa osd osn oso osp oss p-p paa pad pan pao pap pas pda pdd pdn pdo pdp pds pn- pna pnd pnn pno pnp pns poa pod pon poo pop pos ppa ppd ppn ppo ppp pps ps- psa psd psn pso psp pss saa sad san sao sap sas sda sdd sdn sdo sdp sds sna snd snn sno snp sns soa sod son soo sop sos spa spd spn spo spp sps ss- ssa ssd ssn sso ssp sss