-ic bbb bbc bbd bbe bbi bbs bbt bcb bcc bcd bce bci bcs bct bdb bdc bdd bde bdi bds bdt be- beb bec bed bee bei bes bet bi- bib bic bid bie bii bis bit bsb bsc bsd bse bsi bss bst btb btc btd bte bti bts btt c-- cbb cbc cbd cbe cbi cbs cbt ccb ccc ccd cce cci ccs cct cdb cdc cdd cde cdi cds cdt ce- ceb cec ced cee cei ces cet ci- cib cic cid cie cii cis cit csb csc csd cse csi css cst ctb ctc ctd cte cti cts ctt dbb dbc dbd dbe dbi dbs dbt dcb dcc dcd dce dci dcs dct ddb ddc ddd dde ddi dds ddt de- deb dec ded dee dei des det di- dib dic did die dii dis dit dsb dsc dsd dse dsi dss dst dtb dtc dtd dte dti dts dtt ebb ebc ebd ebe ebi ebs ebt ec- ecb ecc ecd ece eci ecs ect ed- edb edc edd ede edi eds edt eeb eec eed eee ees eet eib eic eid eie eii eis eit es- esb esc esd ese esi ess est etb etc etd ete eti ets ett i-d ibb ibc ibd ibe ibi ibs ibt icb icc icd ice ici ics ict idb idc idd ide idi ids idt ie- iec ied iee iei ies iet iib iic iid iie iii iis iit is- isb isc isd ise isi iss ist itb itc itd ite iti its itt sbb sbc sbd sbe sbi sbs sbt scb scc scd sce sci scs sct sdb sdc sdd sde sdi sds sdt se- seb sec sed see sei ses set sib sic sid sie sii sis sit ss- ssb ssc ssd sse ssi sss sst stb stc std ste sti sts stt tbb tbc tbd tbe tbi tbs tbt tcb tcc tcd tce tci tcs tct tdb tdc tdd tde tdi tds tdt te- teb tec ted tee tei tes tet tib tic tid tie tii tis tit tsb tsc tsd tse tsi tss tst ttb ttc ttd tte tti tts ttt