-ic bbb bbc bbd bbe bbi bbk bbs bcb bcc bcd bce bci bck bcs bdb bdc bdd bde bdi bdk bds be- beb bec bed bee bei bek bes bi- bib bic bid bie bii bik bis bkb bkc bke bkk bks bsb bsc bsd bse bsi bsk bss c-- cbb cbc cbd cbe cbi cbk cbs ccb ccc ccd cce cci cck ccs cdb cdc cdd cde cdi cdk cds ce- ceb cec ced cee cei cek ces ci- cib cic cid cie cii cik cis ckb ckc ckd cki cks csb csc csd cse csi csk css dbb dbc dbd dbe dbi dbk dbs dcb dcc dcd dce dci dck dcs ddb ddc ddd dde ddi ddk dds de- deb dec ded dee dei dek des di- dib dic did die dii dik dis dkb dkc dke dki dkk dks dsb dsc dsd dse dsi dsk dss ebb ebc ebd ebe ebi ebk ebs ec- ecb ecc ecd ece eci eck ecs ed- edb edc edd ede edi edk eds eeb eec eed eee eek ees eib eic eid eie eii eik eis ekb ekc ekd eke eki eks es- esb esc esd ese esi esk ess i-d ibb ibc ibd ibe ibi ibk ibs icb icc icd ice ici ick ics idb idc idd ide idi idk ids ie- iec ied iee iei iek ies iib iic iid iie iii iis ikb ikc ike iki ikk iks is- isb isc isd ise isi isk iss kbb kbc kbd kbe kbi kbk kbs kcb kcc kcd kce kci kck kcs kdb kdc kde kdk kds ke- keb kec ked kee kei kek kes kib kic kid kie kii kik kis kkb kkc kke kki kkk kks ksb ksc ksd kse ksi ksk kss sbb sbc sbd sbe sbi sbk sbs scb scc scd sce sci sck scs sdb sdc sdd sde sdi sdk sds se- seb sec sed see sei sek ses sib sic sid sie sii sik sis sk- skb skc skd ske ski skk sks ss- ssb ssc ssd sse ssi ssk sss