fff ffi ffm ffn ffo ffp ffr ffs fif fii fim fin fip fir fis fmf fmi fmm fmn fmo fmp fmr fms fnf fni fnm fnn fnp fnr fns fof foi fom fon foo fop for fos fpi fpm fpn fpo fpp fpr fps frf fri frm frn fro frp frr frs fsf fsi fsm fsn fso fsp fsr fss i-f iff ifi ifm ifn ifo ifp ifr ifs iif iii iim iin iio iip iir iis im- imf imi imm imn imo imp ims in- inf ini inm inn ino inp inr ins io- iof ioi iom ion ioo iop ior ios ipf ipi ipm ipn ipo ipp ipr ips ir- irf iri irm irn iro irp irr irs is- isf isi ism isn iso isp isr iss m-f m-o m-r mff mfi mfm mfn mfo mfp mfr mfs mi- mif mii mim min mio mip mir mis mmf mmi mmm mmn mmo mmp mmr mms mnf mni mnm mnn mno mnp mnr mns mof moi mom mon moo mop mor mos mpf mpi mpm mpn mpo mpp mpr mps mrf mri mrm mrn mro mrp mrr mrs msf msi msm msn mso msp msr mss n-i nff nfi nfn nfo nfp nfr nfs nif nii nim nin nio nip nir nis nmi nmm nmn nmo nmp nmr nms nnf nni nnm nnn nno nnp nns no- nof noi nom non noo nop nor nos npf npi npm npn npo npp npr nps nrf nri nrm nrn nro nrp nrr nrs nsf nsi nsm nsn nso nsp nsr nss o-i of- off ofi ofm ofn ofo ofp ofr ofs oif oii oim oin oio oip oir ois om- omf omi omm omn omo omp omr oms on- onf oni onn ono onp onr ons oo- oof ooi oom oon ooo oop oor oos op- opf opi opm opn opo opp opr ops or- orf ori orm orn oro orp orr ors os- osf osi osm osn oso osp osr oss p-p pff pfi pfm pfn pfo pfp pfr pfs pif pii pim pin pio pip pir pis pmf pmi pmm pmn pmo pmp pmr pms pn- pnf pni pnm pnn pno pnp pnr pns pof poi pom pon poo pop por pos ppf ppi ppm ppn ppo ppp ppr pps prf pri prm prn pro prp prr prs ps- psf psi psm psn pso psp psr pss rff rfi rfm rfn rfo rfp rfr rfs rif rii rim rin rio rip rir ris rmf rmi rmm rmn rmo rmp rmr rms rni rnm rnn rno rnp rnr rns rof roi rom ron roo rop ror ros rpf rpi rpm rpn rpo rpp rpr rps rrf rri rrm rrn rrp rrr rrs rsf rsi rsm rsn rso rsp rsr rss sff sfi sfm sfn sfo sfp sfr sfs sif sii sim sin sio sip sir sis smf smi smm smn smo smp smr sms snf sni snm snn sno snp snr sns sof soi som son soo sop sor sos spf spi spm spn spo spp spr sps sr- srf sri srm srn sro srp srr srs ss- ssf ssi ssm ssn sso ssp ssr sss