b-u bbb bbc bbl bbm bbt bbu bcb bcc bcl bcm bct bcu blb blc bll blm blt blu bmb bmc bml bmm bmt bmu btb btc btl btm btt btu bub buc bul bum but buu c-- cbb cbc cbl cbm cbt cbu ccb ccc ccl ccm cct ccu cl- clb clc cll clm clt clu cmb cmc cml cmm cmt cmu ctb ctc ctl ctm ctt ctu cub cuc cul cum cut cuu lbb lbc lbl lbm lbt lbu lcb lcc lcl lcm lct lcu llb llc lll llm llt llu lmb lmc lml lmm lmt lmu ltb ltc ltl ltm ltt ltu lub luc lul lum lut luu mbb mbc mbl mbm mbt mbu mc- mcb mcc mcl mcm mct mcu mlb mlc mll mlm mlt mlu mmb mmc mml mmm mmt mmu mtb mtc mtl mtm mtt mtu mub muc mul mum mut muu tbb tbc tbl tbm tbt tbu tcb tcc tcl tcm tct tcu tlc tll tlm tlt tlu tmb tmc tml tmm tmt tmu ttb ttc ttl ttm ttt ttu tub tuc tul tum tut tuu ubb ubc ubl ubt ubu ucb ucc ucl ucm uct ucu ulb ulc ull ulm ult ulu um- umb umc uml umm umt umu utb utc utl utm utt utu uuc uum uut uuu