The problem I have is bit vague, so I will try to explain as best as I can.
Suppose we have a base number '$x$' and a set of unique number $'a_1', 'a_2', 'a_3', 'a_4'$ and so on
Now $a_1$ perform some operation on $x$ and results in $y_1$ From $y_1$, I should be able to identify that $a_1$ has performed operations on this number
Now on $y_1, a_2$ performed similar operations and results in $y_2$. From $y_2$, I should be able to infer that either $a_1$ or $a_2$ has performed operations on it and none other numbers had ($a_3, a_4$ etc)
So I am looking for some logic, that can help me create this scenario.