-ic bbb bbc bbe bbi bbm bbs bcb bcc bce bci bcm bcs be- beb bec bee bei bem bes bi- bib bic bie bii bim bis bmb bmc bme bmi bmm bms bsb bsc bse bsi bsm bss c-- cbb cbc cbe cbi cbm cbs ccb ccc cce cci ccm ccs ce- ceb cec cee cei cem ces ci- cib cic cie cii cim cis cmb cmc cme cmi cmm cms csb csc cse csi csm css ebb ebc ebe ebi ebm ebs ec- ecb ecc ece eci ecm ecs eeb eec eee eem ees eib eic eie eii eim eis em- emb emc eme emi emm ems es- esb esc ese esi esm ess ibb ibc ibe ibi ibm ibs icb icc ice ici icm ics ie- iec iee iei iem ies iib iic iie iii iim iis im- imb imc ime imi imm ims is- isb isc ise isi ism iss mbb mbc mbe mbi mbm mbs mc- mcb mcc mce mci mcm mcs meb mec mee mei mem mes mi- mib mic mie mii mim mis mmb mmc mme mmi mmm mms msb msc mse msi msm mss sbb sbc sbe sbi sbm sbs scb scc sce sci scm scs se- seb sec see sei sem ses sib sic sie sii sim sis smb smc sme smi smm sms ss- ssb ssc sse ssi ssm sss