-ic bbb bbc bbd bbe bbi bbk bbs bbt bcb bcc bcd bce bci bck bcs bct bdb bdc bdd bde bdi bdk bds bdt be- beb bec bed bee bei bek bes bet bi- bib bic bid bie bii bik bis bit bkb bkc bke bkk bks bkt bsb bsc bsd bse bsi bsk bss bst btb btc btd bte bti btk bts btt c-- cbb cbc cbd cbe cbi cbk cbs cbt ccb ccc ccd cce cci cck ccs cct cdb cdc cdd cde cdi cdk cds cdt ce- ceb cec ced cee cei cek ces cet ci- cib cic cid cie cii cik cis cit ckb ckc ckd cki cks ckt csb csc csd cse csi csk css cst ctb ctc ctd cte cti ctk cts ctt dbb dbc dbd dbe dbi dbk dbs dbt dcb dcc dcd dce dci dck dcs dct ddb ddc ddd dde ddi ddk dds ddt de- deb dec ded dee dei dek des det di- dib dic did die dii dik dis dit dkb dkc dke dki dkk dks dkt dsb dsc dsd dse dsi dsk dss dst dtb dtc dtd dte dti dtk dts dtt ebb ebc ebd ebe ebi ebk ebs ebt ec- ecb ecc ecd ece eci eck ecs ect ed- edb edc edd ede edi edk eds edt eeb eec eed eee eek ees eet eib eic eid eie eii eik eis eit ekb ekc ekd eke eki eks ekt es- esb esc esd ese esi esk ess est etb etc etd ete eti etk ets ett i-d ibb ibc ibd ibe ibi ibk ibs ibt icb icc icd ice ici ick ics ict idb idc idd ide idi idk ids idt ie- iec ied iee iei iek ies iet iib iic iid iie iii iis iit ikb ikc ike iki ikk iks ikt is- isb isc isd ise isi isk iss ist itb itc itd ite iti itk its itt k-t kbb kbc kbd kbe kbi kbk kbs kcb kcc kcd kce kci kck kcs kct kdb kdc kde kdk kds kdt ke- keb kec ked kee kei kek kes ket kib kic kid kie kii kik kis kit kkb kkc kke kki kkk kks kkt ksb ksc ksd kse ksi ksk kss kst ktb ktc kte ktk kts ktt sbb sbc sbd sbe sbi sbk sbs sbt scb scc scd sce sci sck scs sct sdb sdc sdd sde sdi sdk sds sdt se- seb sec sed see sei sek ses set sib sic sid sie sii sik sis sit sk- skb skc skd ske ski skk sks skt ss- ssb ssc ssd sse ssi ssk sss sst stb stc std ste sti stk sts stt tbb tbc tbd tbe tbi tbk tbs tbt tcb tcc tcd tce tci tck tcs tct tdb tdc tdd tde tdi tdk tds tdt te- teb tec ted tee tei tek tes tet tib tic tid tie tii tik tis tit tkb tkc tke tkk tks tkt tsb tsc tsd tse tsi tsk tss tst ttb ttc ttd tte tti ttk tts ttt