fff ffi ffl ffr fft fif fii fil fir fit flf fli fll flr flt frf fri frl frr frt ftf fti ftl ftr ftt i-f iff ifi ifl ifr ift iif iii iil iir iit il- ilf ili ill ilr ilt ir- irf iri irl irr irt itf iti itl itt lff lfi lfl lfr lft lif lii lil lir lit llf lli lll llr llt lrf lri lrr lrt ltf lti ltl ltr ltt rff rfi rfl rfr rft rif rii ril rir rit rlf rli rll rlr rlt rrf rri rrl rrr rrt rtf rti rtl rtr rtt tff tfi tfl tfr tft tif tii til tir tit tlf tli tll tlr tlt trf tri trl trr trt ttf tti ttl ttr ttt