-ic bbb bbc bbe bbi bbk bbl bbt bcb bcc bce bci bck bcl bct be- beb bec bee bei bek bel bet bi- bib bic bie bii bik bil bit bkb bkc bke bkk bkl bkt blb blc ble bli blk bll blt btb btc bte bti btk btl btt c-- cbb cbc cbe cbi cbk cbl cbt ccb ccc cce cci cck ccl cct ce- ceb cec cee cei cek cel cet ci- cib cic cie cii cik cil cit ckb ckc cki ckt cl- clb clc cle cli clk cll clt ctb ctc cte cti ctk ctl ctt ebb ebc ebe ebi ebk ebl ebt ec- ecb ecc ece eci eck ecl ect eeb eec eee eek eel eet eib eic eie eii eik eil eit ekb ekc eke eki ekl ekt elb elc ele eli elk ell elt etb etc ete eti etk etl ett ibb ibc ibe ibi ibk ibl ibt icb icc ice ici ick icl ict ie- iec iee iei iek iel iet iib iic iie iii iil iit ikb ikc ike iki ikk ikl ikt il- ilb ilc ile ili ilk ill ilt itb itc ite iti itk itl itt k-t kbb kbc kbe kbi kbk kbl kcb kcc kce kci kck kcl kct ke- keb kec kee kei kek kel ket kib kic kie kii kik kil kit kkb kkc kke kki kkk kkl kkt kl- klb klc kli klt ktb ktc kte ktk ktl ktt lbb lbc lbe lbi lbk lbl lbt lcb lcc lce lci lck lcl lct leb lec lee lei lek lel let lib lic lie lii lik lil lit lkb lkl lkt llb llc lle lli llk lll llt ltb ltc lte lti ltk ltl ltt tbb tbc tbe tbi tbk tbl tbt tcb tcc tce tci tck tcl tct te- teb tec tee tei tek tel tet tib tic tie tii tik til tit tkb tkc tke tkk tkl tkt tlc tle tli tlk tll tlt ttb ttc tte tti ttk ttl ttt