-ic b-u bbb bbc bbd bbi bbr bbs bbu bcb bcc bcd bci bcr bcs bcu bdb bdc bdd bdi bdr bds bdu bi- bib bic bid bii bir bis biu brb brd bri brr brs bru bsb bsc bsd bsi bsr bss bsu bub buc bud bui bur bus buu c-- cbb cbc cbd cbi cbr cbs cbu ccb ccc ccd cci ccr ccs ccu cdb cdc cdd cdi cdr cds cdu ci- cib cic cid cii cir cis ciu crb crc crd cri crr crs cru csb csc csd csi csr css csu cub cuc cud cui cur cus cuu dbb dbc dbd dbi dbr dbs dbu dcb dcc dcd dci dcr dcs dcu ddb ddc ddd ddi ddr dds ddu di- dib dic did dii dir dis diu drb drc drd dri drr drs dru dsb dsc dsd dsi dsr dss dsu dub duc dud dui dur dus i-d ibb ibc ibd ibi ibr ibs ibu icb icc icd ici icr ics icu idb idc idd idi idr ids idu iib iic iid iii iir iis iiu ir- irb irc ird iri irr irs iru is- isb isc isd isi isr iss isu iu- iub iuc iud iui iur ius rbb rbc rbd rbi rbr rbs rbu rcb rcc rcd rci rcr rcs rcu rdb rdc rdd rdi rdr rds rdu rib ric rid rii rir ris rrb rrc rrd rri rrr rrs rru rsb rsc rsd rsi rsr rss rsu rub ruc rud rui rur rus ruu sbb sbc sbd sbi sbr sbs sbu scb scc scd sci scr scs scu sdb sdc sdd sdi sdr sds sdu sib sic sid sii sir sis siu sr- srb src srd sri srr srs ss- ssb ssc ssd ssi ssr sss ssu sub suc sud sui sur sus suu ubb ubc ubi ubr ubs ubu ucb ucc ucd uci ucr ucs ucu udb udc udd udi udr uds udu uib uic uid uii uir uis uiu ur- urb urc urd uri urr urs uru usb usc usd usi usr uss usu uuc uur uus uuu