code: def R_input():
      X = np.random.randn(30, 5)
  
      return X.dot(X.T)
  
imports: from typing import Union
  import warnings
  import os
  import numpy
  import scipy
  from scipy.spatial.distance import cdist, pdist, squareform
  import pytest
  from test_core import srand
  import librosa
label_desc: Use image node_id 39 for calling a global function with example usage: R_input() and returns: X