-ic b-u bbb bbc bbd bbe bbi bbl bbt bbu bcb bcc bcd bce bci bcl bct bcu bdb bdc bdd bde bdi bdl bdt bdu be- beb bec bed bee bei bel bet beu bi- bib bic bid bie bii bil bit biu blb blc bld ble bli bll blt blu btb btc btd bte bti btl btt btu bub buc bud bue bui bul but buu c-- cbb cbc cbd cbe cbi cbl cbt cbu ccb ccc ccd cce cci ccl cct ccu cdb cdc cdd cde cdi cdl cdt cdu ce- ceb cec ced cee cei cel cet ceu ci- cib cic cid cie cii cil cit ciu cl- clb clc cld cle cli cll clt clu ctb ctc ctd cte cti ctl ctt ctu cub cuc cud cue cui cul cut cuu dbb dbc dbd dbe dbi dbl dbt dbu dcb dcc dcd dce dci dcl dct dcu ddb ddc ddd dde ddi ddl ddt ddu de- deb dec ded dee dei del det deu di- dib dic did die dii dil dit diu dl- dlb dlc dld dle dli dll dlt dlu dtb dtc dtd dte dti dtl dtt dtu dub duc dud due dui dul dut ebb ebc ebd ebe ebi ebl ebt ebu ec- ecb ecc ecd ece eci ecl ect ecu ed- edb edc edd ede edi edl edt edu eeb eec eed eee eel eet eib eic eid eie eii eil eit eiu elb elc eld ele eli ell elt elu etb etc etd ete eti etl ett etu eu- eub euc eud eue eui eul eut i-d ibb ibc ibd ibe ibi ibl ibt ibu icb icc icd ice ici icl ict icu idb idc idd ide idi idl idt idu ie- iec ied iee iei iel iet iib iic iid iie iii iil iit iiu il- ilb ilc ild ile ili ill ilt ilu itb itc itd ite iti itl itt itu iu- iub iuc iud iue iui iut lbb lbc lbd lbe lbi lbl lbt lbu lcb lcc lcd lce lci lcl lct lcu ldb ldc ldd lde ldi ldl ldt ldu leb lec led lee lei lel let leu lib lic lid lie lii lil lit liu llb llc lld lle lli lll llt llu ltb ltc ltd lte lti ltl ltt ltu lub luc lud lue lui lul lut luu tbb tbc tbd tbe tbi tbl tbt tbu tcb tcc tcd tce tci tcl tct tcu tdb tdc tdd tde tdi tdl tdt tdu te- teb tec ted tee tei tel tet teu tib tic tid tie tii til tit tiu tlc tld tle tli tll tlt tlu ttb ttc ttd tte tti ttl ttt ttu tub tuc tud tue tui tul tut tuu ubb ubc ube ubi ubl ubt ubu ucb ucc ucd uce uci ucl uct ucu udb udc udd ude udi udl udt udu ueb uec ued uee uei uel uet uib uic uid uie uii uil uit uiu ulb ulc uld ule uli ull ult ulu utb utc utd ute uti utl utt utu uuc uue uut uuu