-ic b-u bbb bbc bbd bbi bbo bbs bbu bcb bcc bcd bci bco bcs bcu bdb bdc bdd bdi bdo bds bdu bi- bib bic bid bii bio bis biu bob boc bod boi boo bos bou bsb bsc bsd bsi bso bss bsu bub buc bud bui buo bus buu c-- cbb cbc cbd cbi cbo cbs cbu ccb ccc ccd cci cco ccs ccu cdb cdc cdd cdi cdo cds cdu ci- cib cic cid cii cio cis ciu co- cob coc cod coi coo cos cou csb csc csd csi cso css csu cub cuc cud cui cuo cus cuu dbb dbc dbd dbi dbo dbs dbu dcb dcc dcd dci dco dcs dcu ddb ddc ddd ddi ddo dds ddu di- dib dic did dii dio dis diu dob doc dod doi doo dos dou dsb dsc dsd dsi dso dss dsu dub duc dud dui duo dus i-d ibb ibc ibd ibi ibo ibs ibu icb icc icd ici ico ics icu idb idc idd idi ido ids idu iib iic iid iii iio iis iiu io- iob ioc iod ioi ioo ios iou is- isb isc isd isi iso iss isu iu- iub iuc iud iui ius o-i ob- obb obc obd obi obo obs obu oc- ocb occ ocd oci oco ocs ocu odb odc odd odi odo ods odu oib oic oid oii oio ois oiu oo- oob ooc ood ooi ooo oos os- osb osc osd osi oso oss osu ou- ouc oud oui ouo ous sbb sbc sbd sbi sbo sbs sbu scb scc scd sci sco scs scu sdb sdc sdd sdi sdo sds sdu sib sic sid sii sio sis siu sob soc sod soi soo sos sou ss- ssb ssc ssd ssi sso sss ssu sub suc sud sui suo sus suu ubb ubc ubi ubo ubs ubu ucb ucc ucd uci uco ucs ucu udb udc udd udi udo uds udu uib uic uid uii uio uis uiu uob uoc uod uoo uos usb usc usd usi uso uss usu uuc uus uuu