fff ffi ffm ffo ffp ffr ffs ffy fif fii fim fip fir fis fmf fmi fmm fmo fmp fmr fms fof foi fom foo fop for fos foy fpi fpm fpo fpp fpr fps fpy frf fri frm fro frp frr frs fry fsf fsi fsm fso fsp fsr fss fy- fyi fyo fyp i-f iff ifi ifm ifo ifp ifr ifs ify iif iii iim iio iip iir iis im- imf imi imm imo imp ims imy io- iof ioi iom ioo iop ior ios ipf ipi ipm ipo ipp ipr ips ipy ir- irf iri irm iro irp irr irs iry is- isf isi ism iso isp isr iss isy iym iyo iyr iys iyy m-f m-o m-r mff mfi mfm mfo mfp mfr mfs mfy mi- mif mii mim mio mip mir mis miy mmf mmi mmm mmo mmp mmr mms mof moi mom moo mop mor mos moy mpf mpi mpm mpo mpp mpr mps mrf mri mrm mro mrp mrr mrs mry msf msi msm mso msp msr mss msy my- myf mym myo myr mys o-i of- off ofi ofm ofo ofp ofr ofs oif oii oim oio oip oir ois om- omf omi omm omo omp omr oms omy oo- oof ooi oom ooo oop oor oos op- opf opi opm opo opp opr ops opy or- orf ori orm oro orp orr ors ory os- osf osi osm oso osp osr oss oyi oyo oys p-p pff pfi pfm pfo pfp pfr pfs pfy pif pii pim pio pip pir pis pmf pmi pmm pmo pmp pmr pms pof poi pom poo pop por pos poy ppf ppi ppm ppo ppp ppr pps prf pri prm pro prp prr prs pry ps- psf psi psm pso psp psr pss psy py- pyf pym pyo pyr pys rff rfi rfm rfo rfp rfr rfs rif rii rim rio rip rir ris riy rmf rmi rmm rmo rmp rmr rms rof roi rom roo rop ror ros roy rpf rpi rpm rpo rpp rpr rps rrf rri rrm rrp rrr rrs rsf rsi rsm rso rsp rsr rss ry- ryf rym ryo ryr rys ryy sff sfi sfm sfo sfp sfr sfs sif sii sim sio sip sir sis smf smi smm smo smp smr sms smy sof soi som soo sop sor sos soy spf spi spm spo spp spr sps spy sr- srf sri srm sro srp srr srs sry ss- ssf ssi ssm sso ssp ssr sss sy- syi sym syp syr sys yff yfm yfr yfs yif yii yim yio yip yir yis ymi ymm ymo yms yof yoi yom yoo yop yor yos yoy ypf ypo yps yrf yro yrp yrs ysi ysm yso ysp ysr yss ysy yyf yys yyy