fff ffi ffk ffr ffs ffu ffy fif fii fik fir fis fiu fkf fki fkk frf fri frk frr frs fru fry fsf fsi fsk fsr fss fsu fuf fui fuk fur fus fuu fy- fyi fyk i-f iff ifi ifr ifs ifu ify iif iii iir iis iiu ikf iki ikk ikr iks iku ir- irf iri irk irr irs iru iry is- isf isi isk isr iss isu isy iu- iui iur ius iyr iys iyy kff kfi kfs kfu kif kii kik kir kis kiu kki kkk kkr kks kku kky krf kri krk krr krs kru kry ksf ksi ksk ksr kss ksu kui kuk kur kus kuu kuy kyr kys kyu rff rfi rfk rfr rfs rfu rif rii rik rir ris riy rkf rkk rks rku rky rrf rri rrk rrr rrs rru rsf rsi rsk rsr rss rsu ruf rui ruk rur rus ruu ruy ry- ryf ryk ryr rys ryu ryy sff sfi sfk sfr sfs sfu sif sii sik sir sis siu sk- skf ski skk skr sks sku sky sr- srf sri srk srr srs sry ss- ssf ssi ssk ssr sss ssu suf sui suk sur sus suu suy sy- syi syk syr sys syu uff ufi ufr ufs ufu uif uii uir uis uiu ukf uki ukk ukr uku ur- urf uri urk urr urs uru ury usf usi usk usr uss usu uur uus uuu uyi uys uyu yff yfr yfs yfu yif yii yir yis yki ykk yrf yrs yru ysi ysk ysr yss ysu ysy yui yuk yur yus yuu yuy yyf yys yyu yyy