-ic b-u bbb bbc bbd bbe bbi bbt bbu bcb bcc bcd bce bci bct bcu bdb bdc bdd bde bdi bdt bdu be- beb bec bed bee bei bet beu bi- bib bic bid bie bii bit biu btb btc btd bte bti btt btu bub buc bud bue bui but buu c-- cbb cbc cbd cbe cbi cbt cbu ccb ccc ccd cce cci cct ccu cdb cdc cdd cde cdi cdt cdu ce- ceb cec ced cee cei cet ceu ci- cib cic cid cie cii cit ciu ctb ctc ctd cte cti ctt ctu cub cuc cud cue cui cut cuu dbb dbc dbd dbe dbi dbt dbu dcb dcc dcd dce dci dct dcu ddb ddc ddd dde ddi ddt ddu de- deb dec ded dee dei det deu di- dib dic did die dii dit diu dtb dtc dtd dte dti dtt dtu dub duc dud due dui dut ebb ebc ebd ebe ebi ebt ebu ec- ecb ecc ecd ece eci ect ecu ed- edb edc edd ede edi edt edu eeb eec eed eee eet eib eic eid eie eii eit eiu etb etc etd ete eti ett etu eu- eub euc eud eue eui eut i-d ibb ibc ibd ibe ibi ibt ibu icb icc icd ice ici ict icu idb idc idd ide idi idt idu ie- iec ied iee iei iet iib iic iid iie iii iit iiu itb itc itd ite iti itt itu iu- iub iuc iud iue iui iut tbb tbc tbd tbe tbi tbt tbu tcb tcc tcd tce tci tct tcu tdb tdc tdd tde tdi tdt tdu te- teb tec ted tee tei tet teu tib tic tid tie tii tit tiu ttb ttc ttd tte tti ttt ttu tub tuc tud tue tui tut tuu ubb ubc ube ubi ubt ubu ucb ucc ucd uce uci uct ucu udb udc udd ude udi udt udu ueb uec ued uee uei uet uib uic uid uie uii uit uiu utb utc utd ute uti utt utu uuc uue uut uuu