fff ffi ffm ffn ffo ffs fft fif fii fim fin fis fit fmf fmi fmm fmn fmo fms fmt fnf fni fnm fnn fns fnt fof foi fom fon foo fos fot fsf fsi fsm fsn fso fss fst ftf fti ftm ftn fto fts ftt i-f iff ifi ifm ifn ifo ifs ift iif iii iim iin iio iis iit im- imf imi imm imn imo ims imt in- inf ini inm inn ino ins int io- iof ioi iom ion ioo ios iot is- isf isi ism isn iso iss ist itf iti itm itn ito its itt m-f m-o mff mfi mfm mfn mfo mfs mft mi- mif mii mim min mio mis mit mmf mmi mmm mmn mmo mms mmt mnf mni mnm mnn mno mns mnt mof moi mom mon moo mos mot msf msi msm msn mso mss mst mtf mti mtm mtn mto mts mtt n-i nff nfi nfn nfo nfs nft nif nii nim nin nio nis nit nmi nmm nmn nmo nms nmt nnf nni nnm nnn nno nns nnt no- nof noi nom non noo nos not nsf nsi nsm nsn nso nss nst ntf nti ntm ntn nto nts ntt o-i of- off ofi ofm ofn ofo ofs oft oif oii oim oin oio ois oit om- omf omi omm omn omo oms omt on- onf oni onn ono ons ont oo- oof ooi oom oon ooo oos oot os- osf osi osm osn oso oss ost ot- otf oti otm otn oto ots ott sff sfi sfm sfn sfo sfs sft sif sii sim sin sio sis sit smf smi smm smn smo sms smt snf sni snm snn sno sns snt sof soi som son soo sos sot ss- ssf ssi ssm ssn sso sss sst stf sti stm stn sto sts stt tff tfi tfm tfn tfo tfs tft tif tii tim tin tio tis tit tmf tmi tmm tmn tmo tms tmt tnf tni tnm tnn tno tns tnt to- tof toi tom ton too tos tot tsf tsi tsm tsn tso tss tst ttf tti ttm ttn tto tts ttt