-ic b-u bbb bbc bbi bbl bbm bbt bbu bcb bcc bci bcl bcm bct bcu bi- bib bic bii bil bim bit biu blb blc bli bll blm blt blu bmb bmc bmi bml bmm bmt bmu btb btc bti btl btm btt btu bub buc bui bul bum but buu c-- cbb cbc cbi cbl cbm cbt cbu ccb ccc cci ccl ccm cct ccu ci- cib cic cii cil cim cit ciu cl- clb clc cli cll clm clt clu cmb cmc cmi cml cmm cmt cmu ctb ctc cti ctl ctm ctt ctu cub cuc cui cul cum cut cuu ibb ibc ibi ibl ibm ibt ibu icb icc ici icl icm ict icu iib iic iii iil iim iit iiu il- ilb ilc ili ill ilm ilt ilu im- imb imc imi iml imm imt imu itb itc iti itl itm itt itu iu- iub iuc iui ium iut lbb lbc lbi lbl lbm lbt lbu lcb lcc lci lcl lcm lct lcu lib lic lii lil lim lit liu llb llc lli lll llm llt llu lmb lmc lmi lml lmm lmt lmu ltb ltc lti ltl ltm ltt ltu lub luc lui lul lum lut luu mbb mbc mbi mbl mbm mbt mbu mc- mcb mcc mci mcl mcm mct mcu mi- mib mic mii mil mim mit miu mlb mlc mli mll mlm mlt mlu mmb mmc mmi mml mmm mmt mmu mtb mtc mti mtl mtm mtt mtu mub muc mui mul mum mut muu tbb tbc tbi tbl tbm tbt tbu tcb tcc tci tcl tcm tct tcu tib tic tii til tim tit tiu tlc tli tll tlm tlt tlu tmb tmc tmi tml tmm tmt tmu ttb ttc tti ttl ttm ttt ttu tub tuc tui tul tum tut tuu ubb ubc ubi ubl ubt ubu ucb ucc uci ucl ucm uct ucu uib uic uii uil uim uit uiu ulb ulc uli ull ulm ult ulu um- umb umc umi uml umm umt umu utb utc uti utl utm utt utu uuc uum uut uuu