-ol b-u bbb bbc bbe bbl bbo bbu bcb bcc bce bcl bco bcu be- beb bec bee bel beo beu blb blc ble bll blo blu bob boc boe bol boo bou bub buc bue bul buo buu c-- cbb cbc cbe cbl cbo cbu ccb ccc cce ccl cco ccu ce- ceb cec cee cel ceo ceu cl- clb clc cle cll clo clu co- cob coc coe col coo cou cub cuc cue cul cuo cuu ebb ebc ebe ebl ebo ebu ec- ecb ecc ece ecl eco ecu eeb eec eee eel eeo elb elc ele ell elo elu eo- eob eoc eoe eol eoo eou eu- eub euc eue eul lbb lbc lbe lbl lbo lbu lcb lcc lce lcl lco lcu leb lec lee lel leo leu llb llc lle lll llo llu lob loc loe lol loo lou lub luc lue lul luo luu ob- obb obc obe obl obo obu oc- ocb occ ocl oco ocu oeb oec oee oel oeo olb olc ole oll olo olu oo- oob ooc ool ooo ou- ouc oue oul ouo ubb ubc ube ubl ubo ubu ucb ucc uce ucl uco ucu ueb uec uee uel ulb ulc ule ull ulo ulu uob uoc uoe uol uoo uuc uue uuu