-ic bbb bbc bbe bbi bbm bbs bbt bcb bcc bce bci bcm bcs bct be- beb bec bee bei bem bes bet bi- bib bic bie bii bim bis bit bmb bmc bme bmi bmm bms bmt bsb bsc bse bsi bsm bss bst btb btc bte bti btm bts btt c-- cbb cbc cbe cbi cbm cbs cbt ccb ccc cce cci ccm ccs cct ce- ceb cec cee cei cem ces cet ci- cib cic cie cii cim cis cit cmb cmc cme cmi cmm cms cmt csb csc cse csi csm css cst ctb ctc cte cti ctm cts ctt ebb ebc ebe ebi ebm ebs ebt ec- ecb ecc ece eci ecm ecs ect eeb eec eee eem ees eet eib eic eie eii eim eis eit em- emb emc eme emi emm ems emt es- esb esc ese esi esm ess est etb etc ete eti etm ets ett ibb ibc ibe ibi ibm ibs ibt icb icc ice ici icm ics ict ie- iec iee iei iem ies iet iib iic iie iii iim iis iit im- imb imc ime imi imm ims imt is- isb isc ise isi ism iss ist itb itc ite iti itm its itt mbb mbc mbe mbi mbm mbs mbt mc- mcb mcc mce mci mcm mcs mct meb mec mee mei mem mes met mi- mib mic mie mii mim mis mit mmb mmc mme mmi mmm mms mmt msb msc mse msi msm mss mst mtb mtc mte mti mtm mts mtt sbb sbc sbe sbi sbm sbs sbt scb scc sce sci scm scs sct se- seb sec see sei sem ses set sib sic sie sii sim sis sit smb smc sme smi smm sms smt ss- ssb ssc sse ssi ssm sss sst stb stc ste sti stm sts stt tbb tbc tbe tbi tbm tbs tbt tcb tcc tce tci tcm tcs tct te- teb tec tee tei tem tes tet tib tic tie tii tim tis tit tmb tmc tme tmi tmm tms tmt tsb tsc tse tsi tsm tss tst ttb ttc tte tti ttm tts ttt