Anti-Plushie language DIY

Anti-Plushie language DIY (APLD for short) is an esolang invented by User:None1. It's Anti-Plushie language, but it's you who decide the restrictions!

Syntax

It's Deadfish, but you can add restrictions:

• x "errmsg": If the accumulator will be x after a command, print "errmsg" (without quotes) and terminate.

Examples

Anti-Plushie language interpreter

4 "Fuck off!"
31 "Cut it out!"
3 "Fuck you!"
2 "Oh shit!!!"

Deadfish interpreter

N

Deadfish, but you can't store 1

1 "You can't store 1"