b-u bbb bbf bbi bbn bbs bbu bfb bff bfi bfn bfs bfu bi- bib bif bii bin bis biu bnb bnf bni bnn bns bnu bsb bsf bsi bsn bss bsu bub buf bui bun bus buu fbb fbf fbi fbn fbs fbu fff ffi ffn ffs ffu fib fif fii fin fis fiu fnb fnf fni fnn fns fnu fsb fsf fsi fsn fss fsu fub fuf fui fun fus fuu i-f ibb ibf ibi ibn ibs ibu ifb iff ifi ifn ifs ifu iib iif iii iin iis iiu in- inb inf ini inn ins inu is- isb isf isi isn iss isu iu- iub iui ius n-i nbb nbf nbi nbn nbs nbu nfb nff nfi nfn nfs nfu nib nif nii nin nis niu nnb nnf nni nnn nns nnu nsb nsf nsi nsn nss nsu nub nui nun nus nuu sbb sbf sbi sbn sbs sbu sfb sff sfi sfn sfs sfu sib sif sii sin sis siu snb snf sni snn sns snu ss- ssb ssf ssi ssn sss ssu sub suf sui sun sus suu ubb ubf ubi ubn ubs ubu uff ufi ufn ufs ufu uib uif uii uin uis uiu un- unb unf uni unn uns unu usb usf usi usn uss usu uun uus uuu