set alternatives

Hi...

i have many atom with two type (type1 and 2) in simulation box, i want
to change atoms type of 1 to the 3 that they are in region "MY".
for more .....see blowe

Hi...

i have many atom with two type (type1 and 2) in simulation box, i want to
change atoms type of 1 to the 3 that they are in region "MY".
for more .....see blowe

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Syntax:
set style ID keyword values ...
1: set type 1 type 3
2: set region MY type 3
now i need to Combined of The above expressions
set style 1 ID1 style 2 ID2 keyword values ...
or
set type 1 region MY type 3

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but this is false
What alternatives are there?

define a group