About face group index

[jeb0813]

@YifengMa9
In the paper, the param was divided into 13 and 51.

We select 13 out of 64 expression parameters that are highly related to mouth movements as the lower
face group, and the other parameters as the upper face group.

But in the code: in core.networks.disentangle_decoder import DisentangleDecoder

upper_face3d_indices=tuple(list(range(19)) + list(range(46, 51))),
lower_face3d_indices=tuple(range(19, 46)),

upper and lower gorup has 24 and 27 elements, 51 in total, 13 were missing from 64.

Can you help me with this question?
Many thanks