b-u bbb bbe bbg bbl bbu be- beb bee beg bel beu bgb bge bgg bgl bgu blb ble blg bll blu bub bue bug bul buu ebb ebe ebg ebl ebu eeb eee eeg eel egb ege egg egl egu elb ele elg ell elu eu- eub eue eug eul gbe gbg gbl gbu ge- geb gee geg gel geu ggb ggg ggu glb gle glg gll glu gu- gub gue gug gul guu lbb lbe lbg lbl lbu leb lee leg lel leu lgb lge lgg lgl lgu llb lle llg lll llu lub lue lug lul luu ubb ube ubg ubl ubu ueb uee ueg uel ugb uge ugg ugl ugu ulb ule ulg ull ulu uue uug uuu