fff ffi ffn ffs ffu fif fii fin fis fiu fnf fni fnn fns fnu fsf fsi fsn fss fsu fuf fui fun fus fuu i-f iff ifi ifn ifs ifu iif iii iin iis iiu in- inf ini inn ins inu is- isf isi isn iss isu iu- iui ius n-i nff nfi nfn nfs nfu nif nii nin nis niu nnf nni nnn nns nnu nsf nsi nsn nss nsu nui nun nus nuu sff sfi sfn sfs sfu sif sii sin sis siu snf sni snn sns snu ss- ssf ssi ssn sss ssu suf sui sun sus suu uff ufi ufn ufs ufu uif uii uin uis uiu un- unf uni unn uns unu usf usi usn uss usu uun uus uuu