-ic b-u bbb bbc bbd bbe bbi bbu bcb bcc bcd bce bci bcu bdb bdc bdd bde bdi bdu be- beb bec bed bee bei beu bi- bib bic bid bie bii biu bub buc bud bue bui buu c-- cbb cbc cbd cbe cbi cbu ccb ccc ccd cce cci ccu cdb cdc cdd cde cdi cdu ce- ceb cec ced cee cei ceu ci- cib cic cid cie cii ciu cub cuc cud cue cui cuu dbb dbc dbd dbe dbi dbu dcb dcc dcd dce dci dcu ddb ddc ddd dde ddi ddu de- deb dec ded dee dei deu di- dib dic did die dii diu dub duc dud due dui ebb ebc ebd ebe ebi ebu ec- ecb ecc ecd ece eci ecu ed- edb edc edd ede edi edu eeb eec eed eee eib eic eid eie eii eiu eu- eub euc eud eue eui i-d ibb ibc ibd ibe ibi ibu icb icc icd ice ici icu idb idc idd ide idi idu ie- iec ied iee iei iib iic iid iie iii iiu iu- iub iuc iud iue iui ubb ubc ube ubi ubu ucb ucc ucd uce uci ucu udb udc udd ude udi udu ueb uec ued uee uei uib uic uid uie uii uiu uuc uue uuu