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  | x = [ 
 |      [1.3, 5.6, 7.8], 
 |      [2.4, 1.8, 6.9], 
 |      [3.5, 1.7, 6.3] 
 |  ] 
 |    
 |  y = [ 
 |      [0.2, 3.4, -9.4], 
 |      [1.6, 7.8, 8.4], 
 |      [3.5, 6.8, 7.9] 
 |  ] 
 |    
 |  s = [] 
 |  row_size = len(x) 
 |  for i in range(0, row_size): 
 |      row = [] 
 |      col_size = len(x[i]) 
 |      for j in range(0, col_size): 
 |          row.append( x[i][j] + y[i][j] ) 
 |      s.append(row) 
 |    
 |  print(s) 
 |    
 |  h = [] 
 |  col_idx = 1 
 |  for i in range(0, row_size): 
 |      row = [ y[i][col_idx] ] 
 |      h.append(row) 
 |    
 |  print(h) 
 |  
  |