-ic bbb bbc bbe bbi bbm bbx bcb bcc bce bci bcm bcx be- beb bec bee bei bem bex bi- bib bic bie bii bim bix bmb bmc bme bmi bmm bmx bxb bxi bxm bxx c-- cbb cbc cbe cbi cbm cbx ccb ccc cce cci ccm ccx ce- ceb cec cee cei cem cex ci- cib cic cie cii cim cix cmb cmc cme cmi cmm cmx cxc cxi cxx ebb ebc ebe ebi ebm ebx ec- ecb ecc ece eci ecm ecx eeb eec eee eem eex eib eic eie eii eim eix em- emb emc eme emi emm emx ex- exc exe exi exx ibb ibc ibe ibi ibm ibx icb icc ice ici icm ie- iec iee iei iem iex iib iic iie iii iim iix im- imb imc ime imi imm imx ixc ixe ixi mbb mbc mbe mbi mbm mbx mc- mcb mcc mce mci mcm mcx meb mec mee mei mem mex mi- mib mic mie mii mim mix mmb mmc mme mmi mmm mmx mxc mxi xbc xbe xbx xcb xci xcx xee xem xex xic xie xii xix xmc xmi xmm xmx xxi xxx