bbb bbe bbi bbm bbs bbx be- beb bee bei bem bes bex bi- bib bie bii bim bis bix bmb bme bmi bmm bms bmx bsb bse bsi bsm bss bsx bxb bxi bxm bxx ebb ebe ebi ebm ebs ebx eeb eee eem ees eex eib eie eii eim eis eix em- emb eme emi emm ems emx es- esb ese esi esm ess esx ex- exe exi exs exx ibb ibe ibi ibm ibs ibx ie- iee iei iem ies iex iib iie iii iim iis iix im- imb ime imi imm ims imx is- isb ise isi ism iss ixe ixi mbb mbe mbi mbm mbs mbx meb mee mei mem mes mex mi- mib mie mii mim mis mix mmb mme mmi mmm mms mmx msb mse msi msm mss msx mxi mxs sbb sbe sbi sbm sbs sbx se- seb see sei sem ses sex sib sie sii sim sis six smb sme smi smm sms smx ss- ssb sse ssi ssm sss ssx sxi sxm sxs xbe xbx xee xem xes xex xie xii xis xix xmi xmm xms xmx xsb xsi xsm xss xxi xxx