bbb bbe bbi bbl be- beb bee bei bel bev bi- bib bie bii bil biv blb ble bli bll blv bvb bve bvi bvl bvv ebb ebe ebi ebl ebv eeb eee eel eev eib eie eii eil eiv elb ele eli ell elv evb eve evi evl evv i-v ibb ibe ibi ibl ibv ie- iee iei iel iev iib iie iii iil il- ilb ile ili ill ilv ivb ive ivi ivl ivv lbb lbe lbi lbl lbv leb lee lei lel lev lib lie lii lil liv llb lle lli lll llv lvb lve lvi lvl lvv v-e vbi vbl vbv veb vee vei vel vi- vib vie vii vil viv vl- vlb vle vll vlv vvb vvi vvv