fff ffi ffn ffo ffp ffr ffs fft fif fii fin fip fir fis fit fnf fni fnn fnp fnr fns fnt fof foi fon foo fop for fos fot fpi fpn fpo fpp fpr fps fpt frf fri frn fro frp frr frs frt fsf fsi fsn fso fsp fsr fss fst ftf fti ftn fto ftp ftr fts ftt i-f iff ifi ifn ifo ifp ifr ifs ift iif iii iin iio iip iir iis iit in- inf ini inn ino inp inr ins int io- iof ioi ion ioo iop ior ios iot ipf ipi ipn ipo ipp ipr ips ipt ir- irf iri irn iro irp irr irs irt is- isf isi isn iso isp isr iss ist itf iti itn ito itp its itt n-i nff nfi nfn nfo nfp nfr nfs nft nif nii nin nio nip nir nis nit nnf nni nnn nno nnp nns nnt no- nof noi non noo nop nor nos not npf npi npn npo npp npr nps npt nrf nri nrn nro nrp nrr nrs nrt nsf nsi nsn nso nsp nsr nss nst ntf nti ntn nto ntp ntr nts ntt o-i of- off ofi ofn ofo ofp ofr ofs oft oif oii oin oio oip oir ois oit on- onf oni onn ono onp onr ons ont oo- oof ooi oon ooo oop oor oos oot op- opf opi opn opo opp opr ops opt or- orf ori orn oro orp orr ors ort os- osf osi osn oso osp osr oss ost ot- otf oti otn oto otp otr ots ott p-p pff pfi pfn pfo pfp pfr pfs pft pif pii pin pio pip pir pis pit pn- pnf pni pnn pno pnp pnr pns pnt pof poi pon poo pop por pos pot ppf ppi ppn ppo ppp ppr pps ppt prf pri prn pro prp prr prs prt ps- psf psi psn pso psp psr pss pst pt- ptf pti ptn pto ptp ptr pts ptt rff rfi rfn rfo rfp rfr rfs rft rif rii rin rio rip rir ris rit rni rnn rno rnp rnr rns rnt rof roi ron roo rop ror ros rot rpf rpi rpn rpo rpp rpr rps rpt rrf rri rrn rrp rrr rrs rrt rsf rsi rsn rso rsp rsr rss rst rtf rti rtn rto rtp rtr rts rtt sff sfi sfn sfo sfp sfr sfs sft sif sii sin sio sip sir sis sit snf sni snn sno snp snr sns snt sof soi son soo sop sor sos sot spf spi spn spo spp spr sps spt sr- srf sri srn sro srp srr srs srt ss- ssf ssi ssn sso ssp ssr sss sst stf sti stn sto stp str sts stt tff tfi tfn tfo tfp tfr tfs tft tif tii tin tio tip tir tis tit tnf tni tnn tno tnp tnr tns tnt to- tof toi ton too top tor tos tot tpf tpi tpn tpo tpp tpr tps tpt trf tri trn tro trp trr trs trt tsf tsi tsn tso tsp tsr tss tst ttf tti ttn tto ttp ttr tts ttt