bbb bbe bbi bbn bbo bbs be- beb bee bei ben beo bes bi- bib bie bii bin bio bis bnb bne bni bnn bno bns bob boe boi bon boo bos bsb bse bsi bsn bso bss ebb ebe ebi ebn ebo ebs eeb eee een eeo ees eib eie eii ein eio eis en- enb ene eni enn eno ens eo- eob eoe eoi eon eoo eos es- esb ese esi esn eso ess ibb ibe ibi ibn ibo ibs ie- iee iei ien ies iib iie iii iin iio iis in- inb ine ini inn ino ins io- iob ioe ioi ion ioo ios is- isb ise isi isn iso iss n-i nbb nbe nbi nbn nbo nbs ne- neb nee nei nen neo nes nib nie nii nin nio nis nnb nne nni nnn nno nns no- nob noe noi non noo nos nsb nse nsi nsn nso nss o-i ob- obb obe obi obn obo obs oeb oee oei oen oeo oes oib oie oii oin oio ois on- onb one oni onn ono ons oo- oob ooi oon ooo oos os- osb ose osi osn oso oss sbb sbe sbi sbn sbo sbs se- seb see sei sen seo ses sib sie sii sin sio sis snb sne sni snn sno sns sob soe soi son soo sos ss- ssb sse ssi ssn sso sss