fff ffi ffn ffr ffs fft ffu fif fii fin fir fis fit fiu fnf fni fnn fnr fns fnt fnu frf fri frn frr frs frt fru fsf fsi fsn fsr fss fst fsu ftf fti ftn ftr fts ftt ftu fuf fui fun fur fus fut fuu i-f iff ifi ifn ifr ifs ift ifu iif iii iin iir iis iit iiu in- inf ini inn inr ins int inu ir- irf iri irn irr irs irt iru is- isf isi isn isr iss ist isu itf iti itn its itt itu iu- iui iur ius iut n-i nff nfi nfn nfr nfs nft nfu nif nii nin nir nis nit niu nnf nni nnn nns nnt nnu nrf nri nrn nrr nrs nrt nru nsf nsi nsn nsr nss nst nsu ntf nti ntn ntr nts ntt ntu nui nun nur nus nut nuu rff rfi rfn rfr rfs rft rfu rif rii rin rir ris rit rni rnn rnr rns rnt rnu rrf rri rrn rrr rrs rrt rru rsf rsi rsn rsr rss rst rsu rtf rti rtn rtr rts rtt rtu ruf rui run rur rus rut ruu sff sfi sfn sfr sfs sft sfu sif sii sin sir sis sit siu snf sni snn snr sns snt snu sr- srf sri srn srr srs srt ss- ssf ssi ssn ssr sss sst ssu stf sti stn str sts stt stu suf sui sun sur sus sut suu tff tfi tfn tfr tfs tft tfu tif tii tin tir tis tit tiu tnf tni tnn tnr tns tnt trf tri trn trr trs trt tru tsf tsi tsn tsr tss tst tsu ttf tti ttn ttr tts ttt ttu tuf tui tun tur tus tut tuu uff ufi ufn ufr ufs uft ufu uif uii uin uir uis uit uiu un- unf uni unn unr uns unt unu ur- urf uri urn urr urs urt uru usf usi usn usr uss ust usu utf uti utn utr uts utt utu uun uur uus uut uuu