Night 1- Wren 12 Jenni 4 Night 2- Wren 16 Jenni 9 Night 3- Wren 20 Jenni 14 Night 4- Wren 24 Jenni 19 Night 5- Wren 28 Jenni 24 Night 6- Wren 32 Jenni 29 Night 7- Wren 36 Jenni 34 Night 8- Wren 40 Jenni 39 Night 9- Wren 44 Jenni 44 It would be 9 nights. Graph using (x) and (y), Wren being (x) and Jenni being (y)