a-a a-i aaa aaf aai aak aas af- afa aff afi afk afs ai- aia aif aii aik ais aka aki akk aks as- asa asf asi ask ass faa faf fai fak fas ffa fff ffi ffk ffs fia fif fii fik fis fka fkf fki fkk fsa fsf fsi fsk fss i-f ia- iaa iaf iai ias ifa iff ifi ifs iia iif iii iis ika ikf iki ikk iks is- isa isf isi isk iss ka- kaa kaf kai kak kas kfa kff kfi kfs kia kif kii kik kis kki kkk kks ksa ksf ksi ksk kss saa saf sai sak sas sfa sff sfi sfk sfs sia sif sii sik sis sk- ska skf ski skk sks ss- ssa ssf ssi ssk sss