a-a aaa aad aak aan aao aar aas ad- ada add adk adn ado adr ads aka akd akk akn ako akr aks an- ana and ank ann ano anr ans aoa aod aok aon aoo aor aos ar- ara ard ark arn aro arr ars as- asa asd ask asn aso asr ass daa dad dak dan dao dar das dda ddd ddk ddn ddo ddr dds dka dkk dko dkr dks dna dnd dnk dnn dno dnr dns doa dod dok don doo dor dos dra drd drk drn dro drr drs dsa dsd dsk dsn dso dsr dss ka- kaa kad kak kan kao kar kas kda kdk kdo kdr kds kkk kkn kkr kks kn- kna knd knk knn kno knr koa kod kok kon koo kor kos kra krd krk krn kro krr krs ksa ksd ksk ksn kso ksr kss naa nad nak nan nao nar nas nda ndd ndk ndn ndo ndr nds nka nkk nkn nko nkr nks nna nnk nnn nno nns no- noa nod nok non noo nor nos nra nrd nrk nrn nro nrr nrs nsa nsd nsk nsn nso nsr nss oaa oad oak oan oao oar oas oda odd odn odo odr ods oka okd okk oko okr oks on- ona ond onk onn ono onr ons oo- ooa ood ook oon ooo oor oos or- ora ord ork orn oro orr ors os- osa osd osk osn oso osr oss ra- raa rad rak ran rao rar ras rda rdd rdn rdo rdr rds rkk rko rks rna rnd rnn rno rnr rns roa rod rok ron roo ror ros rra rrd rrk rrn rrr rrs rsa rsd rsk rsn rso rsr rss saa sad sak san sao sar sas sda sdd sdk sdn sdo sdr sds sk- ska skd skk sko skr sks sna snd snk snn sno snr sns soa sod sok son soo sor sos sr- sra srd srk srn sro srr srs ss- ssa ssd ssk ssn sso ssr sss