bbb bbe bbi bbn bbo bbs bbt be- beb bee bei ben beo bes bet bi- bib bie bii bin bio bis bit bnb bne bni bnn bno bns bnt bob boe boi bon boo bos bot bsb bse bsi bsn bso bss bst btb bte bti btn bto bts btt ebb ebe ebi ebn ebo ebs ebt eeb eee een eeo ees eet eib eie eii ein eio eis eit en- enb ene eni enn eno ens ent eo- eob eoe eoi eon eoo eos eot es- esb ese esi esn eso ess est etb ete eti etn eto ets ett ibb ibe ibi ibn ibo ibs ibt ie- iee iei ien ies iet iib iie iii iin iio iis iit in- inb ine ini inn ino ins int io- iob ioe ioi ion ioo ios iot is- isb ise isi isn iso iss ist itb ite iti itn ito its itt n-i nbb nbe nbi nbn nbo nbs nbt ne- neb nee nei nen neo nes net nib nie nii nin nio nis nit nnb nne nni nnn nno nns nnt no- nob noe noi non noo nos not nsb nse nsi nsn nso nss nst ntb nte nti ntn nto nts ntt o-i ob- obb obe obi obn obo obs obt oeb oee oei oen oeo oes oet oib oie oii oin oio ois oit on- onb one oni onn ono ons ont oo- oob ooi oon ooo oos oot os- osb ose osi osn oso oss ost ot- otb ote oti otn oto ots ott sbb sbe sbi sbn sbo sbs sbt se- seb see sei sen seo ses set sib sie sii sin sio sis sit snb sne sni snn sno sns snt sob soe soi son soo sos sot ss- ssb sse ssi ssn sso sss sst stb ste sti stn sto sts stt tbb tbe tbi tbn tbo tbs tbt te- teb tee tei ten teo tes tet tib tie tii tin tio tis tit tnb tne tni tnn tno tns tnt to- tob toe toi ton too tos tot tsb tse tsi tsn tso tss tst ttb tte tti ttn tto tts ttt