fff ffi ffl ffr ffs fft fif fii fil fir fis fit flf fli fll flr fls flt frf fri frl frr frs frt fsf fsi fsl fsr fss fst ftf fti ftl ftr fts ftt i-f iff ifi ifl ifr ifs ift iif iii iil iir iis iit il- ilf ili ill ilr ils ilt ir- irf iri irl irr irs irt is- isf isi isl isr iss ist itf iti itl its itt lff lfi lfl lfr lfs lft lif lii lil lir lis lit llf lli lll llr lls llt lrf lri lrr lrs lrt lsf lsi lsl lsr lss lst ltf lti ltl ltr lts ltt rff rfi rfl rfr rfs rft rif rii ril rir ris rit rlf rli rll rlr rls rlt rrf rri rrl rrr rrs rrt rsf rsi rsl rsr rss rst rtf rti rtl rtr rts rtt sff sfi sfl sfr sfs sft sif sii sil sir sis sit slf sli sll slr sls slt sr- srf sri srl srr srs srt ss- ssf ssi ssl ssr sss sst stf sti stl str sts stt tff tfi tfl tfr tfs tft tif tii til tir tis tit tlf tli tll tlr tls tlt trf tri trl trr trs trt tsf tsi tsl tsr tss tst ttf tti ttl ttr tts ttt