Puzzle time!

[nojh]

1
1 1
2 1
1 2 1 1
1 1 1 2 2 1
3 1 2 2 1 1
1 3 1 1 2 2 2 1

So given the above, what is the next line?

Comments are moderated. I'll make visible wrong answers but save right answers until the end.

Comments

[insaneamoeba]

Nope, stumped me.