Postscript question

[PryGuy]

Good day, everyone!

I have a string, something like en_US, fr_FR, ru_RU, etc. I need to extract the last two capital letters after the underscore. As you understand there's a fixed number of characters everywhere, so it is probably possible to extract the last two chars.

This is a gfxboot script so it's not Postscript Level 2 and 'search' operator doesn't work. Tried to google it but there's not much information on Postscript.

Please help,
thanks in advance.

[Lux Perpetua]

Isn't it simply:

dup length 2 sub 2 getinterval