## TETRIS DOMAIN GENERATOR.
## IPC 2014
## author: Mauro Vallati -- University of Huddersfield

Usage:  generator.py <grid_size> <conf_blocks>
	 line numbers is used for defining number of lines of the screen.
	 The number of column is fixed at 4. E.g., 8-> 8x4 grid. Only odd numbers accepted.
	 conf_blocks:
		 1 -> only 1x1 square blocks
		 2 -> only 2x1 blocks
		 3 -> only L-shaped blocks
		 4 -> mix of blocks

** Take care, generator can return unsolvable instances!! **
