hash               array
+---+---+            +---+
| A |   | -\   /---> |   | 0
+---+---+   \ /      +---+
| B |   | ---/-\ /-> |   | 1
+---+---+   / \ \    +---+
| C |   | -/   / \-> |   | 2
+---+---+     / \    +---+
| D |   | -\ /   \-> |   | 3
+---+---+   \        +---+
| E |   | -/ \-----> |   | 4
+---+---+            +---+