fff ffi ffo ffr ffs fft ffu ffy fif fii fir fis fit fiu fof foi foo for fos fot fou foy frf fri fro frr frs frt fru fry fsf fsi fso fsr fss fst fsu ftf fti fto ftr fts ftt ftu fty fuf fui fuo fur fus fut fuu fy- fyi fyo i-f iff ifi ifo ifr ifs ift ifu ify iif iii iio iir iis iit iiu io- iof ioi ioo ior ios iot iou ir- irf iri iro irr irs irt iru iry is- isf isi iso isr iss ist isu isy itf iti ito its itt itu ity iu- iui iur ius iut iyo iyr iys iyt iyy o-i of- off ofi ofo ofr ofs oft ofu oif oii oio oir ois oit oiu oo- oof ooi ooo oor oos oot or- orf ori oro orr ors ort oru ory os- osf osi oso osr oss ost osu ot- otf oti oto otr ots ott otu ou- ouf oui ouo our ous out oyi oyo oys rff rfi rfo rfr rfs rft rfu rif rii rio rir ris rit riy rof roi roo ror ros rot rou roy rrf rri rrr rrs rrt rru rsf rsi rso rsr rss rst rsu rtf rti rto rtr rts rtt rtu rty ruf rui ruo rur rus rut ruu ruy ry- ryf ryo ryr rys ryu ryy sff sfi sfo sfr sfs sft sfu sif sii sio sir sis sit siu sof soi soo sor sos sot sou soy sr- srf sri sro srr srs srt sry ss- ssf ssi sso ssr sss sst ssu stf sti sto str sts stt stu sty suf sui suo sur sus sut suu suy sy- syi syr sys syt syu tff tfi tfo tfr tfs tft tfu tif tii tio tir tis tit tiu tiy to- tof toi too tor tos tot tou toy trf tri tro trr trs trt tru try tsf tsi tso tsr tss tst tsu tsy ttf tti tto ttr tts ttt ttu tty tuf tui tuo tur tus tut tuu tuy tyf tyo tyr tys tyt uff ufi ufo ufr ufs uft ufu uif uii uio uir uis uit uiu uoo uor uos uot ur- urf uri uro urr urs urt uru ury usf usi uso usr uss ust usu utf uti uto utr uts utt utu uty uur uus uut uuu uyi uyo uys uyu yff yfr yfs yft yfu yif yii yio yir yis yit yof yoi yoo yor yos yot you yoy yrf yro yrs yrt yru ysi yso ysr yss yst ysu ysy ytf yto ytr yts ytt ytu yui yuo yur yus yut yuu yuy yyf yys yyt yyu yyy