fff ffl ffn ffs fft ffu flf fll fln fls flt flu fnf fnl fnn fns fnt fnu fsf fsl fsn fss fst fsu ftf ftl ftn fts ftt ftu fuf ful fun fus fut fuu lff lfl lfn lfs lft lfu llf lll lln lls llt llu lnl lnn lns lnt lnu lsf lsl lsn lss lst lsu ltf ltl lts ltt ltu luf lul lun lus lut luu nff nfl nfn nfs nft nfu nlf nll nln nls nlt nlu nnf nnl nnn nns nnt nnu nsf nsl nsn nss nst nsu ntf ntn nts ntt ntu nul nun nus nut nuu sff sfl sfn sfs sft sfu slf sll sln sls slt slu snf snl snn sns snt snu ss- ssf ssl ssn sss sst ssu stf stl stn sts stt stu suf sul sun sus sut suu tff tfl tfn tfs tft tfu tlf tll tln tls tlt tlu tnf tnl tnn tns tnt tsf tsl tsn tss tst tsu ttf ttl ttn tts ttt ttu tuf tul tun tus tut tuu uff ufl ufn ufs uft ufu ulf ull uln uls ult ulu un- unf unl unn uns unt unu usf usl usn uss ust usu utf utl utn uts utt utu uun uus uut uuu