fff ffg ffi ffn ffo ffs fgf fgg fgi fgn fgs fif fig fii fin fis fnf fng fni fnn fns fof fog foi fon foo fos fsf fsg fsi fsn fso fss gff gfi gfo gfs ggg ggi ggn ggo ggs gif gig gii gin gio gis gnf gni gnn gno gns gof gog goi gon goo gos gsf gsg gsi gsn gso gss i-f iff ifg ifi ifn ifo ifs igf igg igi ign igo igs iif iii iin iio iis in- inf ing ini inn ino ins io- iof iog ioi ion ioo ios is- isf isg isi isn iso iss n-i nff nfi nfn nfo nfs ngf ngg ngi ngn ngo ngs nif nig nii nin nio nis nnf nng nni nnn nno nns no- nof nog noi non noo nos nsf nsg nsi nsn nso nss o-i of- off ofg ofi ofn ofo ofs ogf ogg ogi ogn ogo ogs oif oii oin oio ois on- onf ong oni onn ono ons oo- oof oog ooi oon ooo oos os- osf osg osi osn oso oss sff sfg sfi sfn sfo sfs sgf sgg sgi sgn sgo sgs sif sig sii sin sio sis snf sng sni snn sno sns sof sog soi son soo sos ss- ssf ssg ssi ssn sso sss