In a skybox DML file which of the following represents what sides?

[Pepsidude]

I'm making a slate edit for myself, and I need to know where to put what sides of the skybox. I have front, left, right, back, up and down textures ready. What do I need to name each of the sides so that the skybox looks decent?

s1
s2
s3
s4
s5
s6

[Ad Bot]

[Mega-Bear]

I never thought the order mattered, but numbering it from number one upwards just makes sense.

[Pepsidude]

Found out by setting the textures to the words. Nevermind then.