prob_piece_dir_constants={"prop_zero","prop_zero","prop_zero","prop_adj","prop_adj"/* <- R */,"prop_adj","prop_zero","prop_zero","prop_zero"};
prob_piece_dir_constants={"prop_zero","prop_zero","prop_zero","prop_next_neighbour","prop_next_neighbour"/* <- R */,"prop_next_neighbour","prop_zero","prop_zero","prop_zero"};
prob_piece_dir_constants={"prop_zero","prop_zero","prop_adj","prop_neighbour","prop_zero"/* <- R */,"prop_neighbour","prop_adj","prop_zero"};
prob_piece_dir_constants={"prop_zero","prop_zero","prop_next_neighbour","prop_direct_neighbour","prop_zero"/* <- R */,"prop_direct_neighbour","prop_next_neighbour","prop_zero"};
prob_piece_dir_constants={"prop_zero"/* <- R */,"prop_neighbour","prop_adj","prop_zero","prop_zero","prop_zero","prop_adj","prop_neighbour"};
prob_piece_dir_constants={"prop_zero"/* <- R */,"prop_direct_neighbour","prop_next_neighbour","prop_zero","prop_zero","prop_zero","prop_next_neighbour","prop_direct_neighbour"};
prob_piece_dir_constants={"prop_adj","prop_zero","prop_zero","prop_zero","prop_adj","prop_neighbour","prop_zero"/* <- R */,"prop_neighbour"};
prob_piece_dir_constants={"prop_next_neighbour","prop_zero","prop_zero","prop_zero","prop_next_neighbour","prop_direct_neighbour","prop_zero"/* <- R */,"prop_direct_neighbour"};
prob_piece_dir_constants={"prop_adj","prop_neighbour","prop_zero"/* <- R */,"prop_neighbour","prop_adj","prop_zero","prop_zero","prop_zero"};
prob_piece_dir_constants={"prop_next_neighbour","prop_direct_neighbour","prop_zero"/* <- R */,"prop_direct_neighbour","prop_next_neighbour","prop_zero","prop_zero","prop_zero"};