bbb bbc bbe bbs bbx bcb bcc bce bcs bcx be- beb bec bee bes bex bsb bsc bse bss bsx bxb bxx c-- cbb cbc cbe cbs cbx ccb ccc cce ccs ccx ce- ceb cec cee ces cex csb csc cse css csx cxc cxs cxx ebb ebc ebe ebs ebx ec- ecb ecc ece ecs ecx eeb eec eee ees eex es- esb esc ese ess esx ex- exc exe exs exx sbb sbc sbe sbs sbx scb scc sce scs scx se- seb sec see ses sex ss- ssb ssc sse sss ssx sxc sxs xbc xbe xbx xcb xcx xee xes xex xsb xsc xss xxx