I have a worksheet, cells, b1, b2 and b3 of which each contains a 10-digit
hexadecimal number.

In another cell, I have the following formula: =mid(b1&b2&b3,3,26)

I have two questions about the above formula.

First, how may I change it so that the three 10-digit numbers will not
always be combined in the order b1, b2, b3, but will be combined in "random"
order?

Secondly, how may I change it so that the 30-digit number thus produced is
reduced to 26 by choosing "randomly" whether to begin the 26-digit number at
the 1st number of the 30 or a subsequent one?