fff ffi ffl ffn ffs fft fif fii fil fin fis fit flf fli fll fln fls flt fnf fni fnl fnn fns fnt fsf fsi fsl fsn fss fst ftf fti ftl ftn fts ftt i-f iff ifi ifl ifn ifs ift iif iii iil iin iis iit il- ilf ili ill iln ils ilt in- inf ini inl inn ins int is- isf isi isl isn iss ist itf iti itl itn its itt lff lfi lfl lfn lfs lft lif lii lil lin lis lit llf lli lll lln lls llt lni lnl lnn lns lnt lsf lsi lsl lsn lss lst ltf lti ltl lts ltt n-i nff nfi nfl nfn nfs nft nif nii nil nin nis nit nlf nli nll nln nls nlt nnf nni nnl nnn nns nnt nsf nsi nsl nsn nss nst ntf nti ntn nts ntt sff sfi sfl sfn sfs sft sif sii sil sin sis sit slf sli sll sln sls slt snf sni snl snn sns snt ss- ssf ssi ssl ssn sss sst stf sti stl stn sts stt tff tfi tfl tfn tfs tft tif tii til tin tis tit tlf tli tll tln tls tlt tnf tni tnl tnn tns tnt tsf tsi tsl tsn tss tst ttf tti ttl ttn tts ttt