-ic b-u bbb bbc bbd bbi bbo bbr bbu bcb bcc bcd bci bco bcr bcu bdb bdc bdd bdi bdo bdr bdu bi- bib bic bid bii bio bir biu bob boc bod boi boo bor bou brb brd bri bro brr bru bub buc bud bui buo bur buu c-- cbb cbc cbd cbi cbo cbr cbu ccb ccc ccd cci cco ccr ccu cdb cdc cdd cdi cdo cdr cdu ci- cib cic cid cii cio cir ciu co- cob coc cod coi coo cor cou crb crc crd cri cro crr cru cub cuc cud cui cuo cur cuu dbb dbc dbd dbi dbo dbr dbu dcb dcc dcd dci dco dcr dcu ddb ddc ddd ddi ddo ddr ddu di- dib dic did dii dio dir diu dob doc dod doi doo dor dou drb drc drd dri dro drr dru dub duc dud dui duo dur i-d ibb ibc ibd ibi ibo ibr ibu icb icc icd ici ico icr icu idb idc idd idi ido idr idu iib iic iid iii iio iir iiu io- iob ioc iod ioi ioo ior iou ir- irb irc ird iri iro irr iru iu- iub iuc iud iui iur o-i ob- obb obc obd obi obo obr obu oc- ocb occ ocd oci oco ocr ocu odb odc odd odi odo odr odu oib oic oid oii oio oir oiu oo- oob ooc ood ooi ooo oor or- orb orc ord ori oro orr oru ou- ouc oud oui ouo our rbb rbc rbd rbi rbo rbr rbu rcb rcc rcd rci rco rcr rcu rdb rdc rdd rdi rdo rdr rdu rib ric rid rii rio rir rob roc rod roi roo ror rou rrb rrc rrd rri rrr rru rub ruc rud rui ruo rur ruu ubb ubc ubi ubo ubr ubu ucb ucc ucd uci uco ucr ucu udb udc udd udi udo udr udu uib uic uid uii uio uir uiu uob uoc uod uoo uor ur- urb urc urd uri uro urr uru uuc uur uuu