-ic b-u bbb bbc bbd bbi bbs bbu bcb bcc bcd bci bcs bcu bdb bdc bdd bdi bds bdu bi- bib bic bid bii bis biu bsb bsc bsd bsi bss bsu bub buc bud bui bus buu c-- cbb cbc cbd cbi cbs cbu ccb ccc ccd cci ccs ccu cdb cdc cdd cdi cds cdu ci- cib cic cid cii cis ciu csb csc csd csi css csu cub cuc cud cui cus cuu dbb dbc dbd dbi dbs dbu dcb dcc dcd dci dcs dcu ddb ddc ddd ddi dds ddu di- dib dic did dii dis diu dsb dsc dsd dsi dss dsu dub duc dud dui dus i-d ibb ibc ibd ibi ibs ibu icb icc icd ici ics icu idb idc idd idi ids idu iib iic iid iii iis iiu is- isb isc isd isi iss isu iu- iub iuc iud iui ius sbb sbc sbd sbi sbs sbu scb scc scd sci scs scu sdb sdc sdd sdi sds sdu sib sic sid sii sis siu ss- ssb ssc ssd ssi sss ssu sub suc sud sui sus suu ubb ubc ubi ubs ubu ucb ucc ucd uci ucs ucu udb udc udd udi uds udu uib uic uid uii uis uiu usb usc usd usi uss usu uuc uus uuu