fff ffi ffm ffn ffo ffr ffs fif fii fim fin fir fis fmf fmi fmm fmn fmo fmr fms fnf fni fnm fnn fnr fns fof foi fom fon foo for fos frf fri frm frn fro frr frs fsf fsi fsm fsn fso fsr fss i-f iff ifi ifm ifn ifo ifr ifs iif iii iim iin iio iir iis im- imf imi imm imn imo ims in- inf ini inm inn ino inr ins io- iof ioi iom ion ioo ior ios ir- irf iri irm irn iro irr irs is- isf isi ism isn iso isr iss m-f m-o m-r mff mfi mfm mfn mfo mfr mfs mi- mif mii mim min mio mir mis mmf mmi mmm mmn mmo mmr mms mnf mni mnm mnn mno mnr mns mof moi mom mon moo mor mos mrf mri mrm mrn mro mrr mrs msf msi msm msn mso msr mss n-i nff nfi nfn nfo nfr nfs nif nii nim nin nio nir nis nmi nmm nmn nmo nmr nms nnf nni nnm nnn nno nns no- nof noi nom non noo nor nos nrf nri nrm nrn nro nrr nrs nsf nsi nsm nsn nso nsr nss o-i of- off ofi ofm ofn ofo ofr ofs oif oii oim oin oio oir ois om- omf omi omm omn omo omr oms on- onf oni onn ono onr ons oo- oof ooi oom oon ooo oor oos or- orf ori orm orn oro orr ors os- osf osi osm osn oso osr oss rff rfi rfm rfn rfo rfr rfs rif rii rim rin rio rir ris rmf rmi rmm rmn rmo rmr rms rni rnm rnn rno rnr rns rof roi rom ron roo ror ros rrf rri rrm rrn rrr rrs rsf rsi rsm rsn rso rsr rss sff sfi sfm sfn sfo sfr sfs sif sii sim sin sio sir sis smf smi smm smn smo smr sms snf sni snm snn sno snr sns sof soi som son soo sor sos sr- srf sri srm srn sro srr srs ss- ssf ssi ssm ssn sso ssr sss