code: def _reshuffle_dct3(y, n, axis, dst):
      """Reorder entries to allow computation of DCT/DST-II via FFT."""
      x = cupy.empty_like(y)
      n_half = (n + 1) // 2
  
      # Store first half of y in the even entries of the output
      sl_even = [slice(None)] * y.ndim
      sl_even[axis] = slice(0, None, 2)
      sl_even = tuple(sl_even)
  
      sl_half = [slice(None)] * y.ndim
      sl_half[axis] = slice(0, n_half)
      x[sl_even] = y[tuple(sl_half)]
  
      # Store the second half of y in the odd entries of the output
      sl_odd = [slice(None)] * y.ndim
      sl_odd[axis] = slice(1, None, 2)
      sl_odd = tuple(sl_odd)
  
      sl_half[axis] = slice(-1, n_half - 1, -1)
      if dst:
          x[sl_odd] = -y[tuple(sl_half)]
      else:
          x[sl_odd] = y[tuple(sl_half)]
      return x
  
imports: import math
  import numbers
  import operator
  import numpy
  import cupy
  from cupy import _core
  from cupy.fft._fft import _cook_shape
  from cupyx.scipy.fft import _fft
label_desc: Use image node_id 6 for calling a global function with example usage: _reshuffle_dct3(y, n, axis, dst) and returns: x