-ic b-u bbb bbc bbd bbi bbk bbo bbu bcb bcc bcd bci bck bco bcu bdb bdc bdd bdi bdk bdo bdu bi- bib bic bid bii bik bio biu bkb bkc bkk bko bob boc bod boi bok boo bou bub buc bud bui buk buo buu c-- cbb cbc cbd cbi cbk cbo cbu ccb ccc ccd cci cck cco ccu cdb cdc cdd cdi cdk cdo cdu ci- cib cic cid cii cik cio ciu ckb ckc ckd cki cko co- cob coc cod coi cok coo cou cub cuc cud cui cuk cuo cuu dbb dbc dbd dbi dbk dbo dbu dcb dcc dcd dci dck dco dcu ddb ddc ddd ddi ddk ddo ddu di- dib dic did dii dik dio diu dkb dkc dki dkk dko dku dob doc dod doi dok doo dou dub duc dud dui duk duo i-d ibb ibc ibd ibi ibk ibo ibu icb icc icd ici ick ico icu idb idc idd idi idk ido idu iib iic iid iii iio iiu ikb ikc iki ikk iko iku io- iob ioc iod ioi ioo iou iu- iub iuc iud iui kbb kbc kbd kbi kbk kbo kbu kcb kcc kcd kci kck kcu kdb kdc kdk kdo kdu kib kic kid kii kik kio kiu kkb kkc kki kkk kku kob koc kod koi kok koo kou kub kuc kud kui kuk kuu o-i ob- obb obc obd obi obk obo obu oc- ocb occ ocd oci ock oco ocu odb odc odd odi odo odu oib oic oid oii oik oio oiu okb okc okd oki okk oko oku oo- oob ooc ood ooi ook ooo ou- ouc oud oui ouk ouo ubb ubc ubi ubk ubo ubu ucb ucc ucd uci uck uco ucu udb udc udd udi udk udo udu uib uic uid uii uio uiu ukb ukc uki ukk uku uob uoc uod uok uoo uuc uuu