-ic bbb bbc bbd bbe bbi bbk bbn bbs bcb bcc bcd bce bci bck bcn bcs bdb bdc bdd bde bdi bdk bds be- beb bec bed bee bei bek ben bes bi- bib bic bid bie bii bik bin bis bkb bkc bke bkk bkn bks bnb bnc bnd bne bni bnk bnn bns bsb bsc bsd bse bsi bsk bsn bss c-- cbb cbc cbd cbe cbi cbk cbn cbs ccb ccc ccd cce cci cck ccn ccs cdb cdc cdd cde cdi cdk cdn cds ce- ceb cec ced cee cei cek cen ces ci- cib cic cid cie cii cik cin cis ckb ckc ckd cki cks cn- cnb cnc cnd cne cni cnn cns csb csc csd cse csi csk csn css dbb dbc dbd dbe dbi dbk dbn dbs dcb dcc dcd dce dci dck dcn dcs ddb ddc ddd dde ddi ddk ddn dds de- deb dec ded dee dei dek den des di- dib dic did die dii dik din dis dkb dkc dke dki dkk dks dnb dnc dnd dne dni dnk dnn dns dsb dsc dsd dse dsi dsk dsn dss ebb ebc ebd ebe ebi ebk ebn ebs ec- ecb ecc ecd ece eci eck ecn ecs ed- edb edc edd ede edi edk edn eds eeb eec eed eee eek een ees eib eic eid eie eii eik ein eis ekb ekc ekd eke eki eks en- enb enc end ene eni enk enn ens es- esb esc esd ese esi esk esn ess i-d ibb ibc ibd ibe ibi ibk ibn ibs icb icc icd ice ici ick icn ics idb idc idd ide idi idk idn ids ie- iec ied iee iei iek ien ies iib iic iid iie iii iin iis ikb ikc ike iki ikk iks in- inb inc ind ine ini ink inn ins is- isb isc isd ise isi isk isn iss kbb kbc kbd kbe kbi kbk kbn kbs kcb kcc kcd kce kci kck kcn kcs kdb kdc kde kdk kds ke- keb kec ked kee kei kek ken kes kib kic kid kie kii kik kin kis kkb kkc kke kki kkk kkn kks kn- knc knd kne kni knk knn ksb ksc ksd kse ksi ksk ksn kss n-i nbb nbc nbd nbe nbi nbk nbn nbs ncb ncc ncd nce nci nck ncn ncs ndb ndc ndd nde ndi ndk ndn nds ne- neb nec ned nee nei nek nen nes nib nic nid nie nii nik nin nis nkc nke nki nkk nkn nks nnb nnc nne nni nnk nnn nns nsb nsc nsd nse nsi nsk nsn nss sbb sbc sbd sbe sbi sbk sbn sbs scb scc scd sce sci sck scn scs sdb sdc sdd sde sdi sdk sdn sds se- seb sec sed see sei sek sen ses sib sic sid sie sii sik sin sis sk- skb skc skd ske ski skk sks snb snc snd sne sni snk snn sns ss- ssb ssc ssd sse ssi ssk ssn sss