No numbers above 037?

Hey, I’m making a tile game and I based each tile’s name in the format 001, 002, 011, and so on. When I came to making the 38th tile, I realised that actionscript wouldn’t allow it, which is really confusing.

Is there a way around this? And it needs the 0 in front for when I get into the hundreds, because I was going to allow map sharing.

By the way, if you have no idea what I’m talking about, paste this onto a blank keyframe (on the actionscript panel) then test it:

lol = 038;

It will display the error message as:

**[SIZE=1]Error Scene=Scene 1, layer=Layer 1, frame=1:Line 1: Syntax error.
lol = 038;

Total ActionScript Errors: 1 Reported Errors: 1[/SIZE]**

But strangely lol = 037; works fine.