b-u bbb bbc bbe bbl bbm bbu bcb bcc bce bcl bcm bcu be- beb bec bee bel bem beu blb blc ble bll blm blu bmb bmc bme bml bmm bmu bub buc bue bul bum buu c-- cbb cbc cbe cbl cbm cbu ccb ccc cce ccl ccm ccu ce- ceb cec cee cel cem ceu cl- clb clc cle cll clm clu cmb cmc cme cml cmm cmu cub cuc cue cul cum cuu ebb ebc ebe ebl ebm ebu ec- ecb ecc ece ecl ecm ecu eeb eec eee eel eem elb elc ele ell elm elu em- emb emc eme eml emm emu eu- eub euc eue eul lbb lbc lbe lbl lbm lbu lcb lcc lce lcl lcm lcu leb lec lee lel lem leu llb llc lle lll llm llu lmb lmc lme lml lmm lmu lub luc lue lul lum luu mbb mbc mbe mbl mbm mbu mc- mcb mcc mce mcl mcm mcu meb mec mee mel mem meu mlb mlc mle mll mlm mlu mmb mmc mme mml mmm mmu mub muc mue mul mum muu ubb ubc ube ubl ubu ucb ucc uce ucl ucm ucu ueb uec uee uel uem ulb ulc ule ull ulm ulu um- umb umc ume uml umm umu uuc uue uum uuu