fff ffi ffn ffo ffr fft fif fii fin fir fit fnf fni fnn fnr fnt fof foi fon foo for fot frf fri frn fro frr frt ftf fti ftn fto ftr ftt i-f iff ifi ifn ifo ifr ift iif iii iin iio iir iit in- inf ini inn ino inr int io- iof ioi ion ioo ior iot ir- irf iri irn iro irr irt itf iti itn ito itt n-i nff nfi nfn nfo nfr nft nif nii nin nio nir nit nnf nni nnn nno nnt no- nof noi non noo nor not nrf nri nrn nro nrr nrt ntf nti ntn nto ntr ntt o-i of- off ofi ofn ofo ofr oft oif oii oin oio oir oit on- onf oni onn ono onr ont oo- oof ooi oon ooo oor oot or- orf ori orn oro orr ort ot- otf oti otn oto otr ott rff rfi rfn rfo rfr rft rif rii rin rio rir rit rni rnn rno rnr rnt rof roi ron roo ror rot rrf rri rrn rrr rrt rtf rti rtn rto rtr rtt tff tfi tfn tfo tfr tft tif tii tin tio tir tit tnf tni tnn tno tnr tnt to- tof toi ton too tor tot trf tri trn tro trr trt ttf tti ttn tto ttr ttt