fff ffm ffn ffo ffs ffu fmf fmm fmn fmo fms fmu fnf fnm fnn fns fnu fof fom fon foo fos fou fsf fsm fsn fso fss fsu fuf fum fun fuo fus fuu m-f m-o mff mfm mfn mfo mfs mfu mmf mmm mmn mmo mms mmu mnf mnm mnn mno mns mnu mof mom mon moo mos mou msf msm msn mso mss msu muf mum mun mus muu nff nfn nfo nfs nfu nmm nmn nmo nms nmu nnf nnm nnn nno nns nnu no- nof nom non noo nos nou nsf nsm nsn nso nss nsu num nun nuo nus nuu of- off ofm ofn ofo ofs ofu om- omf omm omn omo oms omu on- onf onn ono ons onu oo- oof oom oon ooo oos os- osf osm osn oso oss osu ou- ouf oum oun ouo ous sff sfm sfn sfo sfs sfu smf smm smn smo sms smu snf snm snn sno sns snu sof som son soo sos sou ss- ssf ssm ssn sso sss ssu suf sum sun suo sus suu uff ufm ufn ufo ufs ufu um- umf umm umn umo ums umu un- unf unm unn uno uns unu uom uon uoo uos usf usm usn uso uss usu uum uun uus uuu