bbb bbd bbe bbk bbn bbo bbs bdb bdd bde bdk bdo bds be- beb bed bee bek ben beo bes bkb bke bkk bkn bko bks bnb bnd bne bnk bnn bno bns bob bod boe bok bon boo bos bsb bsd bse bsk bsn bso bss dbb dbd dbe dbk dbn dbo dbs ddb ddd dde ddk ddn ddo dds de- deb ded dee dek den deo des dkb dke dkk dko dks dnb dnd dne dnk dnn dno dns dob dod doe dok don doo dos dsb dsd dse dsk dsn dso dss ebb ebd ebe ebk ebn ebo ebs ed- edb edd ede edk edn edo eds eeb eed eee eek een eeo ees ekb ekd eke eko eks en- enb end ene enk enn eno ens eo- eob eod eoe eok eon eoo eos es- esb esd ese esk esn eso ess kbb kbd kbe kbk kbn kbo kbs kdb kde kdk kdo kds ke- keb ked kee kek ken keo kes kkb kke kkk kkn kks kn- knd kne knk knn kno kob kod koe kok kon koo kos ksb ksd kse ksk ksn kso kss nbb nbd nbe nbk nbn nbo nbs ndb ndd nde ndk ndn ndo nds ne- neb ned nee nek nen neo nes nke nkk nkn nko nks nnb nne nnk nnn nno nns no- nob nod noe nok non noo nos nsb nsd nse nsk nsn nso nss ob- obb obd obe obk obn obo obs odb odd ode odn odo ods oeb oed oee oen oeo oes okb okd oke okk oko oks on- onb ond one onk onn ono ons oo- oob ood ook oon ooo oos os- osb osd ose osk osn oso oss sbb sbd sbe sbk sbn sbo sbs sdb sdd sde sdk sdn sdo sds se- seb sed see sek sen seo ses sk- skb skd ske skk sko sks snb snd sne snk snn sno sns sob sod soe sok son soo sos ss- ssb ssd sse ssk ssn sso sss