a-a a-i aaa aaf aai aak aan aao aas af- afa aff afi afk afn afo afs ai- aia aif aii aik ain aio ais aka aki akk akn ako aks an- ana anf ani ank ann ano ans aoa aof aoi aok aon aoo aos as- asa asf asi ask asn aso ass faa faf fai fak fan fao fas ffa fff ffi ffk ffn ffo ffs fia fif fii fik fin fis fka fkf fki fkk fna fnf fni fnk fnn fns foa fof foi fok fon foo fos fsa fsf fsi fsk fsn fso fss i-f ia- iaa iaf iai ian iao ias ifa iff ifi ifn ifo ifs iia iif iii iin iio iis ika ikf iki ikk iko iks in- ina inf ini ink inn ino ins io- ioa iof ioi ion ioo ios is- isa isf isi isk isn iso iss ka- kaa kaf kai kak kan kao kas kfa kff kfi kfo kfs kia kif kii kik kin kio kis kki kkk kkn kks kn- kna knf kni knk knn kno koa kof koi kok kon koo kos ksa ksf ksi ksk ksn kso kss n-i naa naf nai nak nan nao nas nfa nff nfi nfk nfn nfo nfs nia nif nii nik nin nio nis nka nkf nki nkk nkn nko nks nna nnf nni nnk nnn nno nns no- noa nof noi nok non noo nos nsa nsf nsi nsk nsn nso nss o-i oaa oaf oai oak oan oao oas of- ofa off ofi ofn ofo ofs oia oif oii oik oin oio ois oka oki okk oko oks on- ona onf oni onk onn ono ons oo- ooa oof ooi ook oon ooo oos os- osa osf osi osk osn oso oss saa saf sai sak san sao sas sfa sff sfi sfk sfn sfo sfs sia sif sii sik sin sio sis sk- ska skf ski skk sko sks sna snf sni snk snn sno sns soa sof soi sok son soo sos ss- ssa ssf ssi ssk ssn sso sss