Instruct: Identify the main and secondary category of Arxiv papers based on the titles
Query: SU(3) trits of orbifolded E_8 x E_8' heterotic string and supersymmetric
  standard model
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin