-- (Imp 1.5,100)->(Imp 2.3,200)->(Imp *** Exception: Prelude.undefined
e3' = listEG [(exactly 1.5, 100), (exactly 2.3, 200), (after 2.5, 300)]
e3' = listEG [(exactly 1.5, 100), (exactly 2.3, 200), (after 2.5, 300)]
e3' = listEG [(exactly 1.5, 100), (exactly 2.3, 200), (after 2.5, 300)]