-ic b-u bbb bbc bbi bbl bbr bbu bcb bcc bci bcl bcr bcu bi- bib bic bii bil bir biu blb blc bli bll blr blu brb bri brl brr bru bub buc bui bul bur buu c-- cbb cbc cbi cbl cbr cbu ccb ccc cci ccl ccr ccu ci- cib cic cii cil cir ciu cl- clb clc cli cll clr clu crb crc cri crl crr cru cub cuc cui cul cur cuu ibb ibc ibi ibl ibr ibu icb icc ici icl icr icu iib iic iii iil iir iiu il- ilb ilc ili ill ilr ilu ir- irb irc iri irl irr iru iu- iub iuc iui iur lbb lbc lbi lbl lbr lbu lcb lcc lci lcl lcr lcu lib lic lii lil lir liu llb llc lli lll llr llu lrb lrc lri lrr lru lub luc lui lul lur luu rbb rbc rbi rbl rbr rbu rcb rcc rci rcl rcr rcu rib ric rii ril rir rlc rli rll rlr rlu rrb rrc rri rrl rrr rru rub ruc rui rur ruu ubb ubc ubi ubl ubr ubu ucb ucc uci ucl ucr ucu uib uic uii uil uir uiu ulb ulc uli ull ulr ulu ur- urb urc uri url urr uru uuc uur uuu