bbb bbd bbe bbk bbn bbs bdb bdd bde bdk bds be- beb bed bee bek ben bes bkb bke bkk bkn bks bnb bnd bne bnk bnn bns bsb bsd bse bsk bsn bss dbb dbd dbe dbk dbn dbs ddb ddd dde ddk ddn dds de- deb ded dee dek den des dkb dke dkk dks dnb dnd dne dnk dnn dns dsb dsd dse dsk dsn dss ebb ebd ebe ebk ebn ebs ed- edb edd ede edk edn eds eeb eed eee eek een ees ekb ekd eke eks en- enb end ene enk enn ens es- esb esd ese esk esn ess kbb kbd kbe kbk kbn kbs kdb kde kdk kds ke- keb ked kee kek ken kes kkb kke kkk kkn kks kn- knd kne knk knn ksb ksd kse ksk ksn kss nbb nbd nbe nbk nbn nbs ndb ndd nde ndk ndn nds ne- neb ned nee nek nen nes nke nkk nkn nks nnb nne nnk nnn nns nsb nsd nse nsk nsn nss sbb sbd sbe sbk sbn sbs sdb sdd sde sdk sdn sds se- seb sed see sek sen ses sk- skb skd ske skk sks snb snd sne snk snn sns ss- ssb ssd sse ssk ssn sss