fff ffi ffm ffr ffs ffu fif fii fim fir fis fiu fmf fmi fmm fmr fms fmu frf fri frm frr frs fru fsf fsi fsm fsr fss fsu fuf fui fum fur fus fuu i-f iff ifi ifm ifr ifs ifu iif iii iim iir iis iiu im- imf imi imm ims imu ir- irf iri irm irr irs iru is- isf isi ism isr iss isu iu- iui ium iur ius m-f m-r mff mfi mfm mfr mfs mfu mi- mif mii mim mir mis miu mmf mmi mmm mmr mms mmu mrf mri mrm mrr mrs mru msf msi msm msr mss msu muf mui mum mur mus muu rff rfi rfm rfr rfs rfu rif rii rim rir ris rmf rmi rmm rmr rms rrf rri rrm rrr rrs rru rsf rsi rsm rsr rss rsu ruf rui rum rur rus ruu sff sfi sfm sfr sfs sfu sif sii sim sir sis siu smf smi smm smr sms smu sr- srf sri srm srr srs ss- ssf ssi ssm ssr sss ssu suf sui sum sur sus suu uff ufi ufm ufr ufs ufu uif uii uim uir uis uiu um- umf umi umm umr ums umu ur- urf uri urm urr urs uru usf usi usm usr uss usu uum uur uus uuu