-ic bbb bbc bbe bbi bbs bcb bcc bce bci bcs be- beb bec bee bei bes bi- bib bic bie bii bis bsb bsc bse bsi bss c-- cbb cbc cbe cbi cbs ccb ccc cce cci ccs ce- ceb cec cee cei ces ci- cib cic cie cii cis csb csc cse csi css ebb ebc ebe ebi ebs ec- ecb ecc ece eci ecs eeb eec eee ees eib eic eie eii eis es- esb esc ese esi ess ibb ibc ibe ibi ibs icb icc ice ici ics ie- iec iee iei ies iib iic iie iii iis is- isb isc ise isi iss sbb sbc sbe sbi sbs scb scc sce sci scs se- seb sec see sei ses sib sic sie sii sis ss- ssb ssc sse ssi sss