how to move towards next list in the 2d list in python

Question

I have the following 2D list: sorted_neig = [[\'R\', \'W\', \'P\', \'T\', \'S\', \'O\', \'V\'], [\'C\', \'A\', \'B\', \'D\', \'E\', \'Q\'], [\'I\', \'M\', \'K\', \'H\'