-ic b-u bbb bbc bbd bbi bbo bbu bcb bcc bcd bci bco bcu bdb bdc bdd bdi bdo bdu bi- bib bic bid bii bio biu bob boc bod boi boo bou bub buc bud bui buo buu c-- cbb cbc cbd cbi cbo cbu ccb ccc ccd cci cco ccu cdb cdc cdd cdi cdo cdu ci- cib cic cid cii cio ciu co- cob coc cod coi coo cou cub cuc cud cui cuo cuu dbb dbc dbd dbi dbo dbu dcb dcc dcd dci dco dcu ddb ddc ddd ddi ddo ddu di- dib dic did dii dio diu dob doc dod doi doo dou dub duc dud dui duo i-d ibb ibc ibd ibi ibo ibu icb icc icd ici ico icu idb idc idd idi ido idu iib iic iid iii iio iiu io- iob ioc iod ioi ioo iou iu- iub iuc iud iui o-i ob- obb obc obd obi obo obu oc- ocb occ ocd oci oco ocu odb odc odd odi odo odu oib oic oid oii oio oiu oo- oob ooc ood ooi ooo ou- ouc oud oui ouo ubb ubc ubi ubo ubu ucb ucc ucd uci uco ucu udb udc udd udi udo udu uib uic uid uii uio uiu uob uoc uod uoo uuc uuu