Rewrite Rule on Source

Yeti-Switch
1

Looking for suggestion on the following rewrite rule at source:
if the Incoming is from country prefix 1, should be converted randomly from a range of
30-39+Number. Currently we can either convert/replace with one specific result.

eg. +12073352458566 to be randomly result to +332073352458566 or within the range of 30-39+Number.
Thanks

2

there is example with random numbers Numbers translations — Yeti documentation