fff ffi ffn ffs ffy ffz fif fii fin fis fiz fnf fni fnn fns fnz fsf fsi fsn fss fy- fyi fyn fyz i-f iff ifi ifn ifs ify ifz iif iii iin iis in- inf ini inn ins iny is- isf isi isn iss isy iys iyy izi izy izz n-i nff nfi nfn nfs nif nii nin nis niz nnf nni nnn nns nnz nsf nsi nsn nss nsy nsz nyf nyn nys nyy nzf nzi nzs nzz sff sfi sfn sfs sfz sif sii sin sis snf sni snn sns sny ss- ssf ssi ssn sss ssz sy- syi syn sys szi yff yfs yif yii yin yis yiz ynn yns yny ysi yss ysy ysz yyf yys yyy yyz yzf yzy zfn zfs zfy zif zin zis ziz znn zns zsi zsz zzs zzy zzz