-ic bbb bbc bbd bbe bbi bbs bcb bcc bcd bce bci bcs bdb bdc bdd bde bdi bds be- beb bec bed bee bei bes bi- bib bic bid bie bii bis bsb bsc bsd bse bsi bss c-- cbb cbc cbd cbe cbi cbs ccb ccc ccd cce cci ccs cdb cdc cdd cde cdi cds ce- ceb cec ced cee cei ces ci- cib cic cid cie cii cis csb csc csd cse csi css dbb dbc dbd dbe dbi dbs dcb dcc dcd dce dci dcs ddb ddc ddd dde ddi dds de- deb dec ded dee dei des di- dib dic did die dii dis dsb dsc dsd dse dsi dss ebb ebc ebd ebe ebi ebs ec- ecb ecc ecd ece eci ecs ed- edb edc edd ede edi eds eeb eec eed eee ees eib eic eid eie eii eis es- esb esc esd ese esi ess i-d ibb ibc ibd ibe ibi ibs icb icc icd ice ici ics idb idc idd ide idi ids ie- iec ied iee iei ies iib iic iid iie iii iis is- isb isc isd ise isi iss sbb sbc sbd sbe sbi sbs scb scc scd sce sci scs sdb sdc sdd sde sdi sds se- seb sec sed see sei ses sib sic sid sie sii sis ss- ssb ssc ssd sse ssi sss