bbb bbe bbi bbk bbn bbs be- beb bee bei bek ben bes bi- bib bie bii bik bin bis bkb bke bkk bkn bks bnb bne bni bnk bnn bns bsb bse bsi bsk bsn bss ebb ebe ebi ebk ebn ebs eeb eee eek een ees eib eie eii eik ein eis ekb eke eki eks en- enb ene eni enk enn ens es- esb ese esi esk esn ess ibb ibe ibi ibk ibn ibs ie- iee iei iek ien ies iib iie iii iin iis ikb ike iki ikk iks in- inb ine ini ink inn ins is- isb ise isi isk isn iss kbb kbe kbi kbk kbn kbs ke- keb kee kei kek ken kes kib kie kii kik kin kis kkb kke kki kkk kkn kks kn- kne kni knk knn ksb kse ksi ksk ksn kss n-i nbb nbe nbi nbk nbn nbs ne- neb nee nei nek nen nes nib nie nii nik nin nis nke nki nkk nkn nks nnb nne nni nnk nnn nns nsb nse nsi nsk nsn nss sbb sbe sbi sbk sbn sbs se- seb see sei sek sen ses sib sie sii sik sin sis sk- skb ske ski skk sks snb sne sni snk snn sns ss- ssb sse ssi ssk ssn sss