bbb bbf bbi bbn bbo bbs bbt bfb bff bfi bfn bfo bfs bft bi- bib bif bii bin bio bis bit bnb bnf bni bnn bno bns bnt bob bof boi bon boo bos bot bsb bsf bsi bsn bso bss bst btb btf bti btn bto bts btt fbb fbf fbi fbn fbo fbs fbt fff ffi ffn ffo ffs fft fib fif fii fin fis fit fnb fnf fni fnn fns fnt fob fof foi fon foo fos fot fsb fsf fsi fsn fso fss fst ftb ftf fti ftn fto fts ftt i-f ibb ibf ibi ibn ibo ibs ibt ifb iff ifi ifn ifo ifs ift iib iif iii iin iio iis iit in- inb inf ini inn ino ins int io- iob iof ioi ion ioo ios iot is- isb isf isi isn iso iss ist itb itf iti itn ito its itt n-i nbb nbf nbi nbn nbo nbs nbt nfb nff nfi nfn nfo nfs nft nib nif nii nin nio nis nit nnb nnf nni nnn nno nns nnt no- nob nof noi non noo nos not nsb nsf nsi nsn nso nss nst ntb ntf nti ntn nto nts ntt o-i ob- obb obf obi obn obo obs obt of- ofb off ofi ofn ofo ofs oft oib oif oii oin oio ois oit on- onb onf oni onn ono ons ont oo- oob oof ooi oon ooo oos oot os- osb osf osi osn oso oss ost ot- otb otf oti otn oto ots ott sbb sbf sbi sbn sbo sbs sbt sfb sff sfi sfn sfo sfs sft sib sif sii sin sio sis sit snb snf sni snn sno sns snt sob sof soi son soo sos sot ss- ssb ssf ssi ssn sso sss sst stb stf sti stn sto sts stt tbb tbf tbi tbn tbo tbs tbt tfb tff tfi tfn tfo tfs tft tib tif tii tin tio tis tit tnb tnf tni tnn tno tns tnt to- tob tof toi ton too tos tot tsb tsf tsi tsn tso tss tst ttb ttf tti ttn tto tts ttt