-ic b-u bbb bbc bbd bbi bbl bbu bcb bcc bcd bci bcl bcu bdb bdc bdd bdi bdl bdu bi- bib bic bid bii bil biu blb blc bld bli bll blu bub buc bud bui bul buu c-- cbb cbc cbd cbi cbl cbu ccb ccc ccd cci ccl ccu cdb cdc cdd cdi cdl cdu ci- cib cic cid cii cil ciu cl- clb clc cld cli cll clu cub cuc cud cui cul cuu dbb dbc dbd dbi dbl dbu dcb dcc dcd dci dcl dcu ddb ddc ddd ddi ddl ddu di- dib dic did dii dil diu dl- dlb dlc dld dli dll dlu dub duc dud dui dul i-d ibb ibc ibd ibi ibl ibu icb icc icd ici icl icu idb idc idd idi idl idu iib iic iid iii iil iiu il- ilb ilc ild ili ill ilu iu- iub iuc iud iui lbb lbc lbd lbi lbl lbu lcb lcc lcd lci lcl lcu ldb ldc ldd ldi ldl ldu lib lic lid lii lil liu llb llc lld lli lll llu lub luc lud lui lul luu ubb ubc ubi ubl ubu ucb ucc ucd uci ucl ucu udb udc udd udi udl udu uib uic uid uii uil uiu ulb ulc uld uli ull ulu uuc uuu