bbb bbd bbe bbn bbo bbs bdb bdd bde bdo bds be- beb bed bee ben beo bes bnb bnd bne bnn bno bns bob bod boe bon boo bos bsb bsd bse bsn bso bss dbb dbd dbe dbn dbo dbs ddb ddd dde ddn ddo dds de- deb ded dee den deo des dnb dnd dne dnn dno dns dob dod doe don doo dos dsb dsd dse dsn dso dss ebb ebd ebe ebn ebo ebs ed- edb edd ede edn edo eds eeb eed eee een eeo ees en- enb end ene enn eno ens eo- eob eod eoe eon eoo eos es- esb esd ese esn eso ess nbb nbd nbe nbn nbo nbs ndb ndd nde ndn ndo nds ne- neb ned nee nen neo nes nnb nne nnn nno nns no- nob nod noe non noo nos nsb nsd nse nsn nso nss ob- obb obd obe obn obo obs odb odd ode odn odo ods oeb oed oee oen oeo oes on- onb ond one onn ono ons oo- oob ood oon ooo oos os- osb osd ose osn oso oss sbb sbd sbe sbn sbo sbs sdb sdd sde sdn sdo sds se- seb sed see sen seo ses snb snd sne snn sno sns sob sod soe son soo sos ss- ssb ssd sse ssn sso sss