a: my address is HASH(0x2b230)
last:   >>>
next:  HASH(0x22e44e8) >>> b

b: my address is HASH(0x22e44e8)
last:  HASH(0x2b230) >>> a
next:  HASH(0x22e45d8) >>> c

c: my address is HASH(0x22e45d8)
last:  HASH(0x22e44e8) >>> b
next:  HASH(0x22ef2a0) >>> d

d: my address is HASH(0x22ef2a0)
last:  HASH(0x22e45d8) >>> c
next:  HASH(0x22ef468) >>> e

e: my address is HASH(0x22ef468)
last:  HASH(0x22ef2a0) >>> d
next:   >>>