fff ffm ffn ffo ffs fft ffy fmf fmm fmn fmo fms fmt fnf fnm fnn fns fnt fof fom fon foo fos fot foy fsf fsm fsn fso fss fst ftf ftm ftn fto fts ftt fty fy- fyn fyo m-f m-o mff mfm mfn mfo mfs mft mfy mmf mmm mmn mmo mms mmt mnf mnm mnn mno mns mnt mof mom mon moo mos mot moy msf msm msn mso mss mst msy mtf mtm mtn mto mts mtt my- myf mym myn myo mys myt nff nfn nfo nfs nft nmm nmn nmo nms nmt nnf nnm nnn nno nns nnt no- nof nom non noo nos not noy nsf nsm nsn nso nss nst nsy ntf ntm ntn nto nts ntt nyf nym nyn nyo nys nyt nyy of- off ofm ofn ofo ofs oft om- omf omm omn omo oms omt omy on- onf onn ono ons ont ony oo- oof oom oon ooo oos oot os- osf osm osn oso oss ost ot- otf otm otn oto ots ott oyo oys sff sfm sfn sfo sfs sft smf smm smn smo sms smt smy snf snm snn sno sns snt sny sof som son soo sos sot soy ss- ssf ssm ssn sso sss sst stf stm stn sto sts stt sty sy- sym syn sys syt tff tfm tfn tfo tfs tft tmf tmm tmn tmo tms tmt tmy tnf tnm tnn tno tns tnt to- tof tom ton too tos tot toy tsf tsm tsn tso tss tst tsy ttf ttm ttn tto tts ttt tty tyf tym tyn tyo tys tyt yff yfm yfs yft ymm ymo yms ymt ynn yns yny yof yom yon yoo yos yot yoy ysm yso yss yst ysy ytf ytm ytn yto yts ytt yyf yys yyt yyy