Replace item in a list

I want it to act as if it were an application to control things for rent, for example houses:
Example: Jack rents a house to Tom on 07/01.
(LW1: 01) (LW2: Jack)(LW3: Tom)(LW4: 07/01)(LW5: ...).
And when I leave the house I can modify (LW5: 01/12)

With reference to this topic:

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