fff ffi ffn ffo ffp ffr fft fif fii fin fip fir fit fnf fni fnn fnp fnr fnt fof foi fon foo fop for fot fpi fpn fpo fpp fpr fpt frf fri frn fro frp frr frt ftf fti ftn fto ftp ftr ftt i-f iff ifi ifn ifo ifp ifr ift iif iii iin iio iip iir iit in- inf ini inn ino inp inr int io- iof ioi ion ioo iop ior iot ipf ipi ipn ipo ipp ipr ipt ir- irf iri irn iro irp irr irt itf iti itn ito itp itt n-i nff nfi nfn nfo nfp nfr nft nif nii nin nio nip nir nit nnf nni nnn nno nnp nnt no- nof noi non noo nop nor not npf npi npn npo npp npr npt nrf nri nrn nro nrp nrr nrt ntf nti ntn nto ntp ntr ntt o-i of- off ofi ofn ofo ofp ofr oft oif oii oin oio oip oir oit on- onf oni onn ono onp onr ont oo- oof ooi oon ooo oop oor oot op- opf opi opn opo opp opr opt or- orf ori orn oro orp orr ort ot- otf oti otn oto otp otr ott p-p pff pfi pfn pfo pfp pfr pft pif pii pin pio pip pir pit pn- pnf pni pnn pno pnp pnr pnt pof poi pon poo pop por pot ppf ppi ppn ppo ppp ppr ppt prf pri prn pro prp prr prt pt- ptf pti ptn pto ptp ptr ptt rff rfi rfn rfo rfp rfr rft rif rii rin rio rip rir rit rni rnn rno rnp rnr rnt rof roi ron roo rop ror rot rpf rpi rpn rpo rpp rpr rpt rrf rri rrn rrp rrr rrt rtf rti rtn rto rtp rtr rtt tff tfi tfn tfo tfp tfr tft tif tii tin tio tip tir tit tnf tni tnn tno tnp tnr tnt to- tof toi ton too top tor tot tpf tpi tpn tpo tpp tpr tpt trf tri trn tro trp trr trt ttf tti ttn tto ttp ttr ttt