-ic bbb bbc bbd bbe bbi bbk bbl bbs bbt bcb bcc bcd bce bci bck bcl bcs bct bdb bdc bdd bde bdi bdk bdl bds bdt be- beb bec bed bee bei bek bel bes bet bi- bib bic bid bie bii bik bil bis bit bkb bkc bke bkk bkl bks bkt blb blc bld ble bli blk bll bls blt bsb bsc bsd bse bsi bsk bsl bss bst btb btc btd bte bti btk btl bts btt c-- cbb cbc cbd cbe cbi cbk cbl cbs cbt ccb ccc ccd cce cci cck ccl ccs cct cdb cdc cdd cde cdi cdk cdl cds cdt ce- ceb cec ced cee cei cek cel ces cet ci- cib cic cid cie cii cik cil cis cit ckb ckc ckd cki cks ckt cl- clb clc cld cle cli clk cll cls clt csb csc csd cse csi csk csl css cst ctb ctc ctd cte cti ctk ctl cts ctt dbb dbc dbd dbe dbi dbk dbl dbs dbt dcb dcc dcd dce dci dck dcl dcs dct ddb ddc ddd dde ddi ddk ddl dds ddt de- deb dec ded dee dei dek del des det di- dib dic did die dii dik dil dis dit dkb dkc dke dki dkk dkl dks dkt dl- dlb dlc dld dle dli dlk dll dls dlt dsb dsc dsd dse dsi dsk dsl dss dst dtb dtc dtd dte dti dtk dtl dts dtt ebb ebc ebd ebe ebi ebk ebl ebs ebt ec- ecb ecc ecd ece eci eck ecl ecs ect ed- edb edc edd ede edi edk edl eds edt eeb eec eed eee eek eel ees eet eib eic eid eie eii eik eil eis eit ekb ekc ekd eke eki ekl eks ekt elb elc eld ele eli elk ell els elt es- esb esc esd ese esi esk esl ess est etb etc etd ete eti etk etl ets ett i-d ibb ibc ibd ibe ibi ibk ibl ibs ibt icb icc icd ice ici ick icl ics ict idb idc idd ide idi idk idl ids idt ie- iec ied iee iei iek iel ies iet iib iic iid iie iii iil iis iit ikb ikc ike iki ikk ikl iks ikt il- ilb ilc ild ile ili ilk ill ils ilt is- isb isc isd ise isi isk isl iss ist itb itc itd ite iti itk itl its itt k-t kbb kbc kbd kbe kbi kbk kbl kbs kcb kcc kcd kce kci kck kcl kcs kct kdb kdc kde kdk kdl kds kdt ke- keb kec ked kee kei kek kel kes ket kib kic kid kie kii kik kil kis kit kkb kkc kke kki kkk kkl kks kkt kl- klb klc kld kli kls klt ksb ksc ksd kse ksi ksk ksl kss kst ktb ktc kte ktk ktl kts ktt lbb lbc lbd lbe lbi lbk lbl lbs lbt lcb lcc lcd lce lci lck lcl lcs lct ldb ldc ldd lde ldi ldk ldl lds ldt leb lec led lee lei lek lel les let lib lic lid lie lii lik lil lis lit lkb lkl lks lkt llb llc lld lle lli llk lll lls llt lsb lsc lsd lse lsi lsk lsl lss lst ltb ltc ltd lte lti ltk ltl lts ltt sbb sbc sbd sbe sbi sbk sbl sbs sbt scb scc scd sce sci sck scl scs sct sdb sdc sdd sde sdi sdk sdl sds sdt se- seb sec sed see sei sek sel ses set sib sic sid sie sii sik sil sis sit sk- skb skc skd ske ski skk skl sks skt slb slc sld sle sli slk sll sls slt ss- ssb ssc ssd sse ssi ssk ssl sss sst stb stc std ste sti stk stl sts stt tbb tbc tbd tbe tbi tbk tbl tbs tbt tcb tcc tcd tce tci tck tcl tcs tct tdb tdc tdd tde tdi tdk tdl tds tdt te- teb tec ted tee tei tek tel tes tet tib tic tid tie tii tik til tis tit tkb tkc tke tkk tkl tks tkt tlc tld tle tli tlk tll tls tlt tsb tsc tsd tse tsi tsk tsl tss tst ttb ttc ttd tte tti ttk ttl tts ttt