fff ffi ffm ffn ffo ffs fif fii fim fin fis fmf fmi fmm fmn fmo fms fnf fni fnm fnn fns fof foi fom fon foo fos fsf fsi fsm fsn fso fss i-f iff ifi ifm ifn ifo ifs iif iii iim iin iio iis im- imf imi imm imn imo ims in- inf ini inm inn ino ins io- iof ioi iom ion ioo ios is- isf isi ism isn iso iss m-f m-o mff mfi mfm mfn mfo mfs mi- mif mii mim min mio mis mmf mmi mmm mmn mmo mms mnf mni mnm mnn mno mns mof moi mom mon moo mos msf msi msm msn mso mss n-i nff nfi nfn nfo nfs nif nii nim nin nio nis nmi nmm nmn nmo nms nnf nni nnm nnn nno nns no- nof noi nom non noo nos nsf nsi nsm nsn nso nss o-i of- off ofi ofm ofn ofo ofs oif oii oim oin oio ois om- omf omi omm omn omo oms on- onf oni onn ono ons oo- oof ooi oom oon ooo oos os- osf osi osm osn oso oss sff sfi sfm sfn sfo sfs sif sii sim sin sio sis smf smi smm smn smo sms snf sni snm snn sno sns sof soi som son soo sos ss- ssf ssi ssm ssn sso sss